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McLeod 88012K Stage 1 THM400 Automatic Transmission Rebuild Kit with Kolene Steels

(GMC G2500 1979-80, K1500 1979-80, C1500 1979-80, K2500 1979-80, Jimmy 1970-74, 1977-80, C3500 1979-80, K2500 Suburban 1979-80, K3500 1979-80 + 159 more models)

Manufacturer

Picture for manufacturer McLeod

Part Number

88012K
10 reviews
Sale Price

$345.00

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The McLeod 88012K is a Stage 1 performance automatic transmission rebuild kit engineered for GM Turbo-Hydramatic 400 (THM400 / TH400) transmissions. Developed through McLeod's collaboration with Raybestos Powertrain, this comprehensive one-stop-shop kit includes every major component needed for a thorough TH400 rebuild — from clutch packs to seals, bands, and filtration.

Kit Includes:

  • Stage 1 Friction Clutch Pack — OEM-thickness grooved friction plates for enhanced holding capacity
  • Kolene Steel Clutch Pack — Kolene-treated steel plates resist warping under high heat and load
  • PTFE (Teflon) Coated Rings — Provide tighter seals and reduced friction
  • National Oil Seals & Farpak Gaskets — Superior sealing to prevent leaks
  • Brass Transmission Filter — Deep pan compatible; improves fluid flow and filtration
  • Two (2) New Bands — 100% new replacement bands included
  • Thrust Washer Kit — Complete set for full rebuild
  • Bushing Kit — All required bushings for a complete overhaul
  • Performance Overhaul Kit — Comprehensive gaskets and seal package

The Kolene steel treatment is a key differentiator in this kit. Kolene (also known as liquid salt bath ferritic nitrocarburizing) case-hardens the steel plates, dramatically reducing the risk of warping and glazing that commonly occurs in high-performance or high-mileage TH400 applications. Combined with PTFE-coated sealing rings and premium National Oil seals, this kit delivers a tighter, more consistent rebuild compared to standard OEM-replacement kits.

The McLeod 88012K is designed for the GM Turbo-Hydramatic 400 (THM400) automatic transmission used across a wide range of GM and non-GM vehicles from 1965 through 1990. UPC: 887753017994.

Products specifications

Fits

GMC G2500 1979-80, K1500 1979-80, C1500 1979-80, K2500 1979-80, Jimmy 1970-74, 1977-80, C3500 1979-80, K2500 Suburban 1979-80, K3500 1979-80, C15/C1500 Pickup 1968-74, C2500 1979-80, K1500 Suburban 1979-80, C1500 Suburban 1979-80 + 155 more models

Shift Kit Included

No

Transmission Bands Included

Yes

Transmission Seals Included

Yes

Transmission Clutches Included

Yes

Transmission Gaskets Included

Yes

Transmission Filter Included

Yes

Kolene Treated Steels

Yes

Quick finding what I needed

Good

you cancelled my last order for no reason

Great prices, great selection

Very fast transaction and shipping info.. Best price found on the internet..

Fast

Awesome csr best price will buy from again...

Wow. Great Price and extremely fast shipping. I had a CS question and they replied promptly and satisfactorily. I will definitely buy from Autoplicity again.

I'll start off saying that Autoplicity's prices are unbeatable...but, I placed my order on a Saturday night (which I know is the weekend)on a in stock part and it took them till the following Thursday to ship it out. I use my truck to make a living and was hoping to get it a little quicker, but now I'm down another 3-4 days till the part gets here. Also, I sent a e-mail on Tuesday evening regaurding my order and never got a response.

Good price and in stock !

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