transmission size info

The 200R4 & Turbo 400 Have exact Blueprint Trans mount pad location distance Grumpy.
Difference is the TH400 Tailshaft extension housing length.
Moot Minor obsticale to overcome.
Will bolt right in place a TH400 To Replace the much weaker 200R4.

 

You do not want to mess with a 4L60E unless you have a 1999 Chevy Tahoe 4x4 like I have.

 

Chevy Truck TH400 Has the Deep oil pan stock.
Unlike passenger car. Shallow pan used.

 

Looking at the Photo provided by You Grumpy the 200R4 has a wider case than a TH400.
Will fit with room to spare a TH400.

 

The Trans tunnel in the 63 Pontiac Gp is Dinky.
Flat floor design to give huge room sitting down.
The Slim Jim Roto Hydromatic 1961-64 used in Catalina and Grand Prix.
Weak trans.
Just had to bump the floor for lower Bellhousing.
Make my own crossmember from original.
Fit right in the TH400.

 

Lower ears on the TH400 can be removed.
I chose not too.
To run a dust cover back then.
Gain 2 -3 inches more room if lower ears cut off.
I run no dust cover today.
Not needed for Hotrodding.

 

The Torque Rating Chart Grumpy.
200R4 is Rated Low Torque Stock and Modified.

Turbo 400 is Rated High Torque Stock and Modified.

TH400 is the Winner.
Till Funds are Acquired for 4L80E Overdrive.

 

Rated same as 700r4 in stock form

 

Grumpy IS STILL A PRO AT NAILING DOWN THE HOTROD TRUTH.

 

https://oklahomacity.craigslist.org/pts/d/chevy-turbo-400-transmission/6616799169.html

 

https://oklahomacity.craigslist.org/pts/d/turbo-400-auto-transmission/6587887276.html

 

A quick search on Oklahoma Craigslist.

 

Rebuild kits are just $150.
Transgo 400 Pro shift kit under $100.

 

https://www.summitracing.com/parts/trg-400-pro

 

https://www.summitracing.com/parts/hup-gm25hd

 

https://m.ebay.com/itm/TH400-Turbo-...:~NgAAOSwspdaqqOq:sc:USPSPriority!61348!US!-1


Pretty good rebuild kit.
Try and find the kit I bought.

 

https://m.ebay.com/itm/TH400-3L80-T...:r4kAAOxy1klRcESB:sc:USPSPriority!61348!US!-1