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Part Number for a 3.94 Final Drive

Dave_R

Save a Sheep...Buy Brembo
Sep 20, 2004
3,666
1
South Wales
Anyone know the part number for the 3.94 final drive?

Wanna price it up, if it's close to the price of finding a gearbox with this final drive and the cost of striping it to remove the final drive then it might be worth buying new :)

Cheers
 

Dave_R

Save a Sheep...Buy Brembo
Sep 20, 2004
3,666
1
South Wales
Found it out, so for research information!

3.94 final drive is out of a Passat.

Part Number: 02A 409 143K

Gearbox codes: CHA, CEW, AYH, AYM, CAT, CEW, CEY, CEX and CGX.
 
Last edited:

Dave_R

Save a Sheep...Buy Brembo
Sep 20, 2004
3,666
1
South Wales
Slightly lower speeds in each gear but acceleration is improved a lot. I'm not interested in going 140mph, rather get up to speed quicker!

The top table is the current standard box, the bottom table is one fitted with a 3.94 final drive.

GearRatios.jpg
 

Dave_R

Save a Sheep...Buy Brembo
Sep 20, 2004
3,666
1
South Wales
Got the final drive today... doesn't look much for the price :(

Spoken to a bloke about lightening my flywheel and machining the tappered bit off my throttle body to...

So if it doesn't rain saturday off comes the gearbox, get the final drive fitted and rebuilt with new bearings and seals, the flywheel lightened and throttle body fitted next weekend mmmmmmmmm :)
 
Last edited:

RobT

Full throttle trip
Nov 30, 2001
2,558
10
Congleton
best value performance you will have on a 16V.....really good if combined with a quaife diff