Transmissions, Parts, and Adapters

Transmission Adapters

Transmission Adapter Kit Cadillac 472/500/425 engine to Chevy trans
This kit adapts the Cad 472/500/425 to a Chevy V8 bell housing bolt pattern.
Made from 5/16” steel plate, CNC cut.
Built to transfer the Cadillac torque through the rest of the drive train without the failures common with light duty adapters.
Supplied with a mounting bolt kit and 1 piece machined shims to set your converter end play.

Billet TC Locator Extension Bushing (IF you need it)

Transmission Adapter Kit 472/500/425 engine to most ’64-’67 Cad TH400

Transmission Pans

TH400 Finned Aluminum Oil Pan (stock capacity)  Powder-coated black with polished fins or full polish
Fits most GM RWD vehicles with TH400 and TH400-derivative transmissions, including all ’67-’79 Cadillacs, most ’66 Cadillac, and some ’65 Cadillacs, except Eldorado.

TH400 Finned Aluminum Oil Pan (deep) Powder-coated black with polished fins or full polish
Fits most GM RWD vehicles with TH400 and TH400-derivative transmissions, including all ’67-’79 Cadillacs, most ’66 Cadillac, and some ’65 Cadillacs, except Eldorado.
Not recommended for lowered vehicles.

TH425 Finned Aluminum Oil Pan Powder-coated black with polished fins or full polish
Fits ’78-older Eldorado, GMC Motorhome, and Tornado FWD transmissions.

Flex Plates, Flywheels, Etc

When hooking up a Caddy to a Chevy or GMC converter, you have to keep in mind that the bolt pattern on the converter must match the hole pattern on the flex plate. TH-400, 4L80E, and Allison converters generally have the “large” diameter pattern (11.5″), but light duty trannies (‘Glides, TH-350, 700R4, and TH200) have a smaller pattern (10.75″). You cannot safely drill out the stock flex plate, because the smaller circle falls on the stress ridge on the Cad flex plate. Three holes in there, and your chances of blowing the middle out of the flex plate are pretty good. All of our aftermarket and OE replacement flex plates and flywheels have a Cadillac 166 tooth ring gear for use with a stock Cadillac style starter. All are zero balanced like stock and compatible with any 472/ 500/ 425/ 368 Cadillac engine.

OE Spec Stamped Steel Flex Plate Stock replacement, solid style
Uses stock starter. Only fits TH400 / 4L80 converter bolt pattern.

Performance Stamped Steel Flex Plate Dual pattern
Uses stock starter.
Fits TH400 / 4L80 (11.5″) and TH350 / 700R4 / 200R4 / Powerglide / etc (10.75″) converter bolt pattern.

Performance Stamped Steel Flex Plate Dual pattern, SFI certified
Uses stock starter.
Fits TH400 / 4L80 (11.5″) and TH350 / 700R4 / 200R4 / Powerglide / etc (10.75″) converter bolt pattern.

Billet Steel Flex Plate Multi-pattern
Uses stock starter.
Fits TH400 / 4L80 (11.5″) and TH350 / 700R4 / 200R4 / Powerglide / etc (10.75″) converter bolt pattern.

Billet Steel Flywheel for standard clutches
Uses stock starter.
Fits most 10” through 12” car/ light truck clutches.

Billet Steel Flywheel for Long style clutches
Uses stock starter.
Fits most 10” through 12” car/ light truck ‘Long’ style clutches (with unevenly spaced 6 bolt pattern).

Billet Steel Flywheel for pull type clutches
Uses stock starter.
Fits most 10” through 12” car/ light truck pull type clutches
(with deep recess in the center of the flywheel, such as found behind most LSX engines).

Cadillac Pilot Bushing For manual transmission
Fits existing machined hole in crank –
No crank removal or precision machining required in most cases.
For standard GM car/ light truck input shaft size.

Cadillac Drive Hub 1 3/8” 10 Spline
Billet Steel drive hub for Brent Trans and similar.
Splines hardened to R53 for long life.

Starters

HD High Torque Starter Fits all RWD This is the good one – not a cheap chain store rebuild that will fail again

HD High Torque Starter Fits all FWD with Eldo style transaxle. This is the good one – not a cheap chain store rebuild that will fail again. 

Starter Support Strap Supports the back end of the starter to prevent starter breakage

If you are missing this support strap, your starter nose cone can break from even a minor kickback from the big 472 / 500 engine. It can even fail eventually without a kickback problem.
If you are missing the original starter support bracket, you need this item.

Mini Starters call for application info

Transmissions

TH400
Custom built in house to match your custom built engine, not available separately
Price includes a new converter and core charge

Gear Vendors Overdrive Complete kits including electronics
Available for many transmission configurations.
Not available for stock Cadillac long-tail TH400 at this time
For use in a Cadillac with a long-tail TH400 (’76-older), replacing the transmission tail shaft with a shorter one is required.
Available with deep sump pan for extra oil capacity
Available installed, carry-out, or shipped world wide
Not available for Cadillac transmissions with 13″ tail shaft