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Best Automotive Performance Transmission Shift Kits

American Shifter 58941 Single Action Automatic Transmission Shifter Kit with 23" Dual Bend Arm and Black Knob for GM 700R4 Transmission
Available in single push button operation or push button and side shift dual activation. Single action automatic transmission shifter; 23 inches dual bend arm with black knob.
Reviews
"I watched a you tube video for 700r4 install and noted the useage of the hardware locations and then realized that the hardware brackets were not threaded/tapped for lower left or right side and rear mounting plate bolts. Also 5/16-24 is not a common thread tap (NOT available singularrly at Lowes) and both of the rear brackets need this hole tapped."
"I found installation to be simple and all the parts fit well."
"NO instruction included, part seem cheap, connections was hard to make gear shifter keeps coming loose."
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B&M 10025 Shift Improver Shift Kit
The B&M Shift Improver Kit can help increase the performance and durability of your stock automatic transmission. Recalibrates your automatic transmission for crisp shifts, optimum performance, and extended life.
Reviews
"I may be spoiled from driving my newer diesel around, but I can't believe how soft and slow the stock 94 transmission shifted. I did the stage 1 - Heavy Duty springs and I skipped the electronic resistor install thing (pending what I thought of the way it shifted). Start opening it up a little, and it'll push you back in the seat a little bit when it shifts, but I won't be giving it that much throttle 90% of the time and definitely not in the snow. Make sure to get some petroleum jelly for the install to hold all the little check balls and springs into place when you put it back together."
"This on is for a e4od tranny, and the shifting is guite harsh."
"Regarding the quality, it's top notch (even though the supplied drill bit broke), the springs are beefy and strong compared to the stock ones you'll find in there, and there is a new cork pan gasket which is very nice (not my favorite kind, but it worked great and it hasn't the slightest hint of a leak). The installation will require some time and attention, but it can be done easily and with mostly regular tools, if the trans is out of the truck I recommend doing the pump spring modification, if not, then you'll have to do the resistor mod (this is a "either one or the other" deal, don't do both)."
"nice firm shifts now without the overlap.Fairly simple to install ."
"Have not been able to find a shop willing to install it and when I spoke to their customer service (in the US) I asked for shops in New England that have experience with it where I could drive to get it installed, I was told they do not yet have such a list."
"Great kit includes everything, recommend not installing on your own if you don't have mechanic training or experience."
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B&M 70239 Shift Improver Kit for Automatic Transmissions
The B&M Shift Improver Kit can help increase the performance and durability of your stock automatic transmission. Recalibrates your automatic transmission for crisp shifts, optimum performance, and extended life.
Reviews
"If you own a 1985-1991 Automatic Corvette then you need to buy this shift kit."
"Little harder then I was thinking to install but still easier then most I've done."
"Easy to install."
"used this before know it works good."
"Part was right and trans was messed up though."
"It shifts so hard 1st to 2nd that it will bark the tires which is what I wanted at like 3/4 or more throttle but because you take out the 1-2 accumulator spring and replace it with spacers you get a very harsh shift. It actually shifts too hard. I have to tell them that I put a shift kit in this truck. I am going to try and find the box and drop the accumulator piston assembly out and replace it with the springs for the stage 1 RV/Heavy Duty springs."
"Always works well; delivers very firm shifts just the way I like them and saves wear on the internals."
"Followed instructions closely and shifts are sloppy."
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Best Automotive Performance Transmission Snap Rings

QA1 SIB8-101PK Bearing Kit with Snap Ring
Spherical Bearing1/2 in ID x 1-1/16 in OD x 5/8 WidthBearings/Snap Rings/Loctite IncludedSteelKit. Enter your model number to make sure this fits.
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Best Automotive Performance Transmission Fluids

Banks 62560 TransCommand Transmission
Converts Trans Into A Heavy Duty Unit. Enter your model number to make sure this fits.
Reviews
"This works wonders for E40D transmission especially for 7.3 I used this in combination with Rebuilt Motorcraft transmission and it's like a whole new truck."
"Beast!"
"Just like all Banks items, its easy to install and does what it says..."
"I added an intake and headers to my rig and the transmission seemed like it was slipping under heavy load since my mods."
"I expected more from Banks on this; an expensive gamble as it turns out, you can't always trust in a 'name'."
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Best Automotive Performance Transmission Bands

Mopar 0432 9853, Auto Trans Band
A/T BAND. Enter your model number to make sure this fits.
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Best Automotive Performance Transmission Bushings

Whiteline KDT926 Gearbox Bushing
Fix annoying differential movement and noises whilst ensuring appropriate differential pinion angles for maximizing power transfer to the wheels with Whiteline. Enter your model number to make sure this fits.
Reviews
"With both of those and motul tranny fluid this car easily has the best feeling transmission of any car I've ever driven."
"installed in combination with Perrin rear shifter bushing change and Motul 300 75W90 fluid change to trans and diff - immediate results noted in reducing slop, improving positive feel and reducing the notchiness."
"This bushing installs very easily and makes a big difference in drivetrain motion: http://youtu.be/dLzMO6_ZNHk?t=22s. All you'll need is a jack, jackstands, torque wrench, and about 20 minutes."
"Was replacing clutch so did this as well."
"Nice snug fit and came with a sticker."
"Easy install."
"Super easy to install and definitely makes a difference."
"I mean if you dont care about noise and your cars is loud, then i guess it could work for you."
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Best Automotive Performance Transmission Valve Body Kits

TCI 221201 Manual Reverse Shift Pattern Valve Body for GM TH400
Manual Valve Body. Enter your model number to make sure this fits.
Reviews
"unit was in perfect condition and works very well."
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Best Automotive Performance Transmission Hard Parts

B&M 80605 5' Long Performance Shifter Cable
This B&M performance shifter cable is designed to work with most B&M shifters (except race shifters). Enter your model number to make sure this fits.
Reviews
"B&M products in general always impress me."
"Top of the line professional quality."
"I was forced to run this relatively close to my headers, but that doesn't seem to affect it whatsoever."
"fit perfect, works great."
"Well pleased,Fast service."
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Best Automotive Performance Transmission Drive Chains

EXEDY KHC10 OEM Replacement Clutch Kit For Acura RSX Type S 2002-2006 & Honda Civic SI 2006-2008 Only
EXEDY Globalparts Corporation (USA) is a wholly owned subsidiary of the EXEDY Corporation of Japan. Enter your model number to make sure this fits.
Reviews
"Great clutch replacement."
"great clutch with the stock flywheel in my type s. I would definitely buy it again!"
"Each component will come in its own box (PP, Friction disc, throwout bearing, alignment tool and the pilot bushing)."
"This is an oem replacement for an RSX type S, but all you need to make it work on the Civic is a flywheel for an RSX type S. I bought a lightweight XTD flywheel off of eBay."
"Feels great after install."
"I've had this clutch kit installed on my car since December of 2015."
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Best Automotive Performance Transmission Clutch Plates

Centerforce DF352341 Dual Friction Clutch Pressure Plate and Disc Set
The patented Centerforce Dual-Friction disc system distributes pressure plate clamping force evenly over a 360-degree friction-facing on one side of the clutch disc, while the opposing side uses a segmented friction-facing to concentrate clamping pressure and maximize clutch holding-capacity. Some of these processes include the famous Centerforce weight system, Dual-Friction discs, and ball bearing actuated pressure plates, precision billet flywheels and more.
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Best Automotive Performance Transmission Seals & O-Rings

Yukon (YK GM9.5-B) Master Overhaul Kit for GM 9.5" Semi-Float Differential with Triple Lip Seal
A complete package for differential work. Enter your model number to make sure this fits.
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Best Automotive Performance Manual Transmission Rebuild Kits

Moser Engineering 7106 Aluminum Rear Differential Cover for 8.8" Ford Rear End
Moser Engineering 7106 Ford 8.8 Aluminum Rear Cover. Enter your model number to make sure this fits.
Reviews
"Nice high-quality cover that looks fantastic."
"Very important to use the FACTORY fill plug for the recommended fluid level."
"why do they show studs?"
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Best Automotive Performance Transmission Overhaul Packages

Yukon YKGM8.25IFS-B Master Overhaul Kit for GM 8.25" Differential
A complete package for differential work. Enter your model number to make sure this fits.
Reviews
"Make sure to order the crush sleeve for the pinion overhaul as well."
"This kit had all I needed to rebuild my front diff!"
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Best Automotive Performance Automatic Transmission Lines

Mishimoto MMTC-WRX-15BK Black Transmission Cooler for Subaru WRX CVT
20°F temperature decrease compared to using only the stock transmission cooler.
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Best Automotive Performance Automatic Transmission Washers

Yukon (YSPSP-014) Spindle Washer for Dana 28 Differential
Yukon Gear and Axle offers small parts for a wide variety of applications to ensure you have the parts you need to complete your differential repair, rebuild, restoration or upgrade. Enter your model number to make sure this fits.
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Best Automotive Performance Manual Transmission Assemblies

Tremec TCET5009 TKO-600 Series 5 Speed Transmission for GM with 26 Spline Input
Tremec Transmissions TCET5009 GM TKO-600 Series 5-Spd Trans 26 Spline Input. Enter your model number to make sure this fits.
Reviews
"Tremec always makes great transmissions."
"Delivery was fantastic."
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Best Automotive Performance Automatic Transmission Sealing Rings

Transmission Specialties 2541LS Dual Ring Servo with Lip Seal
TRANSMISSION SPECIALTIES, INC 2541LS DUAL RNG SERVO W/LIP SEAL PG. Enter your model number to make sure this fits.
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Best Automotive Performance Transmission Master Cylinder Repair Kits

EXEDY KHC10 OEM Replacement Clutch Kit For Acura RSX Type S 2002-2006 & Honda Civic SI 2006-2008 Only
EXEDY Globalparts Corporation (USA) is a wholly owned subsidiary of the EXEDY Corporation of Japan. Enter your model number to make sure this fits.
Reviews
"Great clutch replacement."
"great clutch with the stock flywheel in my type s. I would definitely buy it again!"
"Each component will come in its own box (PP, Friction disc, throwout bearing, alignment tool and the pilot bushing)."
"This is an oem replacement for an RSX type S, but all you need to make it work on the Civic is a flywheel for an RSX type S. I bought a lightweight XTD flywheel off of eBay."
"Feels great after install."
"I've had this clutch kit installed on my car since December of 2015."
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Best Automotive Performance Automatic Transmission Assemblies

B&M 113001 Street/Strip Automatic Transmission
There are many other new parts, including high performance friction plates, intermediate roller clutch, kickdown band with welded anchors, thrust bearings and races, adjustable modulator, and detent control link with breather and filter. Quality B&M automatic transmission designed and priced for the street enthusiast.
Reviews
"It did require some adjustment to the governor to get the shift points right where I wanted them, but this is expected due to variations in final drive ratio 3.55:1, 4.11:1 etc. I would reccomend this transmission to anybody looking to upgrade from a standard Th350 to a performace Th350 for speed or maybe even just towing."
"Buying this saved me money vs. having a local transmission shop handle the rebuild and modifications that come standard on these B&M units."
"This was a great purchase."
"My only two complaints is that mine leaks from somewhere; I haven't tracked it down yet but I am pretty sure it is the pan. It came in a thick cardboard box with some instapack foam around it, but it was pretty banged up and not sitting right."
"I priced this exact item at about 3 different vendors and found the least expensive being sold through amazon."
"Again B&M makes a good product, but the shipping problem is chronic and has not yet been fixed."
"It showed up broken in about 5 pieces, bought a different brand elsewhere!"
"I ordered the transmission from Amazon and it came from Amazon's store."
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Best Automotive Performance Drivetrain Transmission Gaskets

Moroso 93102 Perm-align Transmission Gasket for GM TH350
Moroso 93102 Perm-align Transmission Gasket for GM TH350. Enter your model number to make sure this fits.
Reviews
"Well worth the money!"
"Sealed up great no leaks."
"This gasket is outstanding super well made I do not have words to express how happy I am with this product."
"This is just anybody needs to fix a leaking pan!"
"best reusable pan gaskets ive used yet!"
"Fit perfectly, and no leaks after installation!"
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Best Automotive Performance Solenoids

Lokar KD-2AODHT Hi-Tech Kickdown Kit for Ford AOD Transmission
Lokar Hi-Tech Kickdown Kit for ford AOD Transmission is designed with a specially extruded liner for extended life of the cable, not to be confused with ordinary brake hose. Enter your model number to make sure this fits.
Reviews
"Follow instructions, and insure that you have the proper throttle valve pressure before you drive the vehicle (35psi in drive and <5psi in park)."
"I have used this kick on multiple projects and it is well worth the price."
"a bit pricy but works slick."
"Kit works and looks great, used on a derby car and it allowed me to adapt the efi to a carb."
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Best Automotive Performance Engine Oil Pans & Drain Plugs

Moroso 20911 Stock Configuration Oil Pan for Honda 1.8L Engines
Stock Configuration Oil Pan for Honda 1.8L Engines has a street/competition oil pan. Enter your model number to make sure this fits.
Reviews
"no leaks, seals right up, heavy duty construction."
"Sealed the first time with an OEM seal."
"Worked out perfect."
"good quality made out of good material, did seal to well with the gasket , have to seal the ports you don't use with Teflon tape."
"Excellent packing and fast delivery!!"
"Awesome form and function."
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