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TCI Auto 311600 TH350 Maximizer 4x4 Transmission for NP203/NP205 Transfer Case

(GMC K1500 1979-81, K2500 1979-81, Jimmy 1975-81, K2500 Suburban 1979-81, K3500 1979-81, K1500 Suburban 1979-81, K25 1975-78, K15 1975-78 + 9 more models)

Manufacturer

Picture for manufacturer TCI Auto

Part Number

311600
14 reviews
Sale Price

$2,495.95

2 left at this price

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The TCI Automotive 311600 TH350 Maximizer 4x4 Transmission is purpose-built for the demands of four-wheel drive applications, featuring a 4-bolt rear output cover designed for direct bolt-up compatibility with the NP203 and NP205 New Process transfer cases.

Four-wheel drive puts unique stress on automatic transmissions — oversized tires, constant torque multiplication through the transfer case, and off-road abuse all accelerate wear on stock units. The TCI Maximizer series addresses these demands head-on with high-performance internal components selected specifically for durability and consistent shift quality under load.

Key Features:

  • Purpose-built TH350 platform optimized for 4x4 drivetrain applications
  • Compatible with NP203 and NP205 transfer cases via 4-bolt rear output cover
  • Rated for applications ranging from 450 to 550 horsepower
  • Built with premium internal components for maximum durability
  • Programmed valve body delivers crisp, repeatable shifts under demanding conditions
  • Designed to handle the added strain of larger-than-stock tires
  • Ideal for trucks, SUVs, and off-road vehicles in demanding 4WD use

Whether you're running a built engine, larger tires, or pushing your truck through tough terrain, the TCI Maximizer 4x4 transmission is engineered to keep up. It's a direct-fit performance upgrade over a worn or stock TH350, delivering the shift quality and internal strength needed for serious four-wheel drive use.

Products specifications

Fits

GMC K1500 1979-81, K2500 1979-81, Jimmy 1975-81, K2500 Suburban 1979-81, K3500 1979-81, K1500 Suburban 1979-81, K25 1975-78, K15 1975-78, K15 Suburban 1975-78, K25 Suburban 1975-78, K35 1977-78; Chevrolet K10 1975-81 + 5 more models

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

Title

Th350 4X4 W/4-Bolt Dust Cover

Fast and easy shopping

Good product, been using for years.

Great

I was very impressed with the price and the speed in getting my purchase to me. I'm actually going to see if you have another product I'm looking for,maybe you have this as well ?I need your help to see if you have a Chrome Rim for the tire I just bought from you ? I need a 20" Chrome Rim for my 2006 Dodge Ram 1500 4.7 Crew Cab, to match the ones I have on my truck now.If you need to see a picture of it,I could send it to you,if this helps ! Sincerely, Peter Strickland

Great service. Super fast shipping. Item was as ordered.

Good

Easy to check if item fits vehicle.

Best price fast shipping. will deffinitly order again

Excellent business. This is my second purchase and there will be more! I ordered my parts over the holiday weekend and they mailed them the Tuesday after Labor Day. The absolute BEST pricing you will get. You will not find a lower price else ware. The shipping doesn't even take forever like most places you get great pricing. Communication is excellent, the site is very easy to use and navigate. I will be doing business with Autoplicity.com many more times and highly recommend them.

Super Fast! Website was easy to user, multiple different payment options (Amazon, Paypal, Credit Card) Got a notification of shipment within 1 hour!

Website is easy to navigate. Parts are easy to find. Checkout was very simple to use. Good overall service.

easy checkout

Wonderful....purchased a set of weight load scales and couldn't find them any cheaper that with Autoplicity....and we received them very timely. Ordered on 1/5 and received on 1/9.

5 STAR MERCHANT! Recommend to everybody. Extremely quick, relieable, honest, and accurate. Item was delivered 2 days sooner than they told me in perfect condition. Additionally, they were the least expensive for the item. I do not know how they do it but they did it.

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