GM 2.8/3.4 V6 TH350/2004R/700R4/4L60 Transmission Adapter Plate
GM 2.8/3.4 V6 TH350/2004R/700R4/4L60 Transmission Adapter Plate
Speedway Motors

|

#91628907

GM 2.8/3.4 V6 TH350/2004R/700R4/4L60 Transmission Adapter Plate

  • Mates 60° Chevy V6 to Chevy Turbo 350 transmission
  • Approximately 1/8” thick
  • For TH350 transmission application
See More

$73.99

/each

In Stock


Quantity

Need Help? Call to Order

Add to a list

Share

Select an engine to verify Fitment

Select Engine

Product Summary

2004R, 700R4, TH350

  • Mates 60° Chevy V6 to Chevy Turbo 350 transmission
  • Approximately 1/8” thick
  • For TH350 transmission application
  • Constructed of the finest steel material and will seal where most gaskets fail
See more details

Key Specs

MFG. Part #91628907
BrandSpeedway Motors
See more specs

Need To Know

Need help?

855.313.9176
View the Help Center

Quick and Easy Returns

Return Policy

Speedway Motors 91628907 Details

Mates 60° Chevy V6 to Chevy Turbo 350 transmission. Approximately 1/8” thick. For TH350 transmission application.

Application

The "T" or mushroom shaped adapter is the converter adapter. The small end presses into the rear of the V6 crank and the larger I.D. then serves as the pilot for the center hub of the 350 torque converter.

GM used 2 bolt circles for their torque converters (10.75" and 11.5") and most V8 flywheels are double drilled to accept either bolt pattern. Some heavy duty applications, like TH400 big block trucks, used the larger bolt pattern. The V6 flywheel should share the standard small bolt circle of the TH350 converter.

On some applications it may be necessary to drill new (or slot the existing) holes in the V6 flywheel to match the torque converter used. The pilot adapter keeps the converter centered in the rear of the crankshaft, the bolts do not perform that function. It is not a difficult operation, and can be accomplished at home with a drill press, or by any competent machinist. Instructions are included.

The small round machined piece is the center adapter for the torque converter pilot hub. The fastener pictured is a special flush head bolt which must be used on the lower passenger side corner of the adapter for clearance in the dowel pin area.

Charts

Speedway Motors 91628907 Specifications

KEY SPECS
MFG. Part #91628907
BrandSpeedway Motors

Ratings & Reviews

4.9

10 Reviews

Overall Assessment

Customers consistently highlighted the product's perfect fit, robust functionality, and versatility as standout attributes. Many users noted it solved their transmission compatibility issues, allowing various engine and transmission combinations to bolt together seamlessly. Its practicality was lauded, with the product being deemed a time and frustration saver due to flawless adapter bolt fittings, aiding in different car modifications. Its quality was verified by the perfect fit and finish. The product, characterized as great and reasonable priced, was frequently recommended over competitor options. Please note one caution: while the adapter bolted up, there were noted challenges regarding limited room for a flexplate and torque converter in small bellhousing setups.

Write A Review

4.9

10 reviews

5

9

4

1

3

0

2

0

1

0

Filter by Ratings

Holden v6 to th400

5.0

a year ago

Mr king

Australia

Verified

Hello mates from Australia this works for mating a th400/350 or glide to our l67 or v6 Ecotec very cheap great product

Would Recommend

Customer review image

Looks good worked perfect

5.0

5 years ago

Badbowtie riley

Norfolk ne

Verified

Used it to put th350 behind a 2.8 v6

Would Recommend

Yes

5.0

6 years ago

Debbie

Indiana

Verified

They had the part that I needed. The customer service is great.

Would Recommend

This adapter solved my problem

5.0

7 years ago

Sparky

ON

Verified

Fit and finish is perfect.allowed the use of a 90° sbc bolt pattern th700r4 transmission to bolt to a 60° cadillac 4.9 engine.works perfectly.

Would Recommend

Adapter Plate Fit Was Perfect

5.0

8 years ago

RogueDave

Waterloo IA

Verified

Would recommend to anyone..

Speedway treats you right.

4.0

8 years ago

Mike

Valley City ND

Verified

Exactly what I ordered

Saved time and frustration

5.0

8 years ago

Thamesvan

Oklahoma

Verified

Adapter bolted up perfectly. I actually used it to bolt a Chevy metric trans to a Pontiac block

Would Recommend

v6 th350 adaptor

5.0

10 years ago

joeo3800turbo

quakertown pa

Great product. Working awesome mounting my th350 to a v6 with the 60 degree housing...so worth it

Would Recommend

Great product

5.0

10 years ago

Robthezukman

Williams az

Verified

Great product and reasonable priced

Would Recommend

great to deal with

5.0

15 years ago

david

roanoke, va

Verified

this was a trial too see if the adapter would mount a 60 degree 700r to 305 it will bolt up but no rom for flexplate and torque converter in small bellhousing [...] very pleased with Speedwaythanksdavid

Would Recommend

Showing 10 of 10 reviews

Questions & Answers

37 Questions • 12 Answers

91628907 Adapter fitment. I have a GM3800 V6 L67 60 degree transmission mount engine. I would like to adapt TH350 transmission to this block. Would this work or is there a different adapter. Thanks

by Johnny1

• 3 years ago

1 answer

View Answer

My 4l65e torque converter has a pilot hub diameter of 1.073. Will the hub adapter fit this torque converter?

by Rob

• 3 years ago

1 answer

View Answer

Will the adapter allow me to mate 91 Chevy 3.1l to a Chevy sm465, will this work for me?

by Jeffery

• 7 years ago

1 answer

View Answer

would this work on manual transmissions?

by omatic

• 7 years ago

1 answer

View Answer

So this is meant for a 60° engine to 90° transmission but can it be used in reverse as in a 90° engine like the 4.3 to a 60° transmission without any modifications to the adapter?

by 4.3 vortec swappin

• 7 years ago

1 answer

View Answer

Can I mate a '89 2.8 v6 from a celebrity to a 4l60 transmission with this? If not, what parts will I need? Is it even possible? I'm new to this stuff.

by Jonnylectron

• 7 years ago

1 answer

View Answer

Will this allow me to use my 2.8 700r4 on my 327sbc and I'll b running a stall converter what all do I need to make it work

by Jessie

• 7 years ago

1 answer

View Answer

Seeing as this is for The gm 60° with the gm metric bellhousing would this work on the 2.2 in my 94 S10 that shares the same pattern? Looking at options for keeping the 4 cyclinder but making 4wd without a devorced unit. Thanks!

by EDuBz

• 7 years ago

2 answers

View Answers

I am looking to install a 700r4 that can off of a 2.8L v6 chevy, into a firebird with a 403 Oldsmobile engine will this adapter work. Thank you

by azbird

• 8 years ago

2 answers

View Answers

Sorry still need to confirm for sure. I have a 700r4 for a small block, and a 2.8l v6, this will make that work?

by Andrew

• 8 years ago

1 answer

View Answer

Load More Questions

10 of 37 questions shown

Fitment

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • GM LC1 2.8

  • 151 Pontiac Iron Duke I4

  • GM LC1 2.8

  • 151 Pontiac Iron Duke I4

  • GM LB8 2.8

  • GM LB8 2.8

  • Gen 1 2.8 LH0

  • GM LH0 3.1

  • Gen 1 2.8 LH0

  • GM LB6 2.8

  • GM LH0 3.1

  • GM LA1 3.4

  • 151 Pontiac Iron Duke I4

  • GM LH0 3.1

  • 151 Pontiac Iron Duke I4

  • GM LH0 3.1

  • GM LQ1 3.4

  • GM LH0 3.1

  • GM LQ1 3.4

  • GM L82 3.1

  • GM LQ1 3.4

  • GM L82 3.1

  • GM LH0 3.1

  • GM L82 3.1

  • GM LQ1 3.4

  • GM L82 3.1

  • GM LA1 3.4

  • 151 Pontiac Iron Duke I4

  • GM LR2 2.8

  • 151 Pontiac Iron Duke I4

  • GM LR2 2.8

  • 151 Pontiac Iron Duke I4

  • GM LL2 2.8

  • GM LR2 2.8

  • 151 Pontiac Iron Duke I4

  • GM LR2 2.8

  • 151 Pontiac Iron Duke I4

  • GM LL2 2.8

  • GM LL2 2.8

  • GM LR2 2.8

  • GM LL2 2.8

  • GM LR2 2.8

  • GM LR2 2.8

  • GM LL2 2.8

  • GM LR2 2.8

  • GM LL2 2.8

  • GM LL2 2.8

  • GM LL2 2.8

  • GM LR2 2.8

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • GM L44 2.8

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • GM LB8 2.8

  • 151 Pontiac Iron Duke I4

  • GM L82 3.1

  • GM LG8 3.1

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

  • GM LE2 2.8

  • Pontiac Iron Duke I4 Tech IV 151

  • Pontiac Iron Duke I4 151

  • GM LE2 2.8

  • 151 Pontiac Iron Duke I4

  • GM LE2 2.8

  • 151 Pontiac Iron Duke I4

  • 151 Pontiac Iron Duke I4

Customer Impersonation Script