Gearing

[tunedbandit]

Hi guys

Iam wanting to raise the gearing
EG: 5Th gear upgrade in my VW T4 2001 1.9TD
shes had most the power increases you can do so she as plenty of power a 1.9TD can have

do any of you guys have parts numbers regarding this
i believe the most would change the ratio to 0.681 but i think 0.658 is available to getting the rpm down more,any advice / help on this would be great.
thanks Rick
Ps iam wanting to "Lower" the 5th gear RPM

[rodpaslow]

I don't know about the gearing on a 02A, I have an 020 tranny with a .71 fifth and at about 3000 rpm I'm easily doing 125 km or 78-79 mph. (96' 020 tranny).

[Rabbit on Roids]

pretty sure the T4s use an air cooled style trans.. or like the audi's had.. and they all use real low final drives, like 4.25:1 or something like that iirc..

[the caveman]

pretty sure the T4s use an air cooled style trans.. or like the audi's had.. and they all use real low final drives, like 4.25:1 or something like that iirc..

He is driving what we know as a Eurovan, so FWD. Basically a 02A trans

[Rabbit on Roids]

ah, thanks for the clarification i was thinking type 4..

i forget things are different over the pond.

[tunedbandit]

VW T4 "Transporter" 1.9TD 2001   AKA   "Euro Van" 

My gear box code is

DQL 06060
14         3

02B 409 3.20 D

these codes read how ive written them
when iam driving in 5Th at 61/62 mph its revving at 3000 rpm
at 70 mph its revving at 3400 rpm so shes a screamer,,there's a few different ratios that can be fitted the rave what most folk fit is 0.68:1 but i think you can get 0.65:1

[the caveman]

If want to be sure ,do some home work on Vag-cat and compare differentials that use the 02A transmission.

[tunedbandit]

If want to be sure ,do some home work on Vag-cat and compare differentials that use the 02A transmission.
cheers buddy for the advice,,vagcat is know longer available over here 

i used it all the time as well,,,,yeah the T4 diff is very low geared & most the vw range have the same 1/2/3/4 gear ratios as the T4 its the diff thats massively low geared equaling the difference between the cars V T4 vans/caravelles,,i could put a diff from a G60 in but it means i will have the van off the road wihile removing the gear box & letting a gear box specialist do the diff side of it,most lads on the T4forum use the 5Th gear from the Mk 3 golf tdi in there T4"s but ive heard there's a even heigher ratio 5Th & to be honest i do really think my 1.9TD will pull that ratio due to the PP mods ive done AKA "Project power" plus once funds allow i will be using the golf TDI motor/loom/ECU  in a popular conversion that quite a few guys have done over here with great success due to them been more tunable with 90 bhp as standard & the fact you can get a decent "Safe" 140 bhp / 220 ft bl of them