Never seen anyone do this and wondering if anyone has tried it. I'm sure the gear ratios are a lot different, and maybe that is why there isn't much on it out there. I have access to a 6 spd swap out of an '05 GLI and was considering it since my current transmission has been quirky lately.
Anyone swapped an 02J 6spd into TDI?
- Thread starter TDI-Guy
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LNXGUY
Top Post Dawg
You're correct, the ratios are completely wrong. Unless those are changed, there's no point in doing this.
By 'changed' do you mean swapping out gears? Changing final drive? I'm curious as I don't know a lot about the physical ratios from transmission to transmission. Pointless as in the car would not be feasable to drive? (my guess is that the gears are too high, and the TDI would bog down on inclines and under load, but that's only a guess)
Do you know where I can get information on the gear ratios from car to car and transmission to transmission? I may go ahead and pick up the parts because they are quite inexpensive, and see if I can maybe change out gears to make it work out. Thanks for your reply.
Do you know where I can get information on the gear ratios from car to car and transmission to transmission? I may go ahead and pick up the parts because they are quite inexpensive, and see if I can maybe change out gears to make it work out. Thanks for your reply.
LNXGUY
Top Post Dawg
He's referring to the O2A me thinks.
Here is a link that I found from a google search that shows gear ratios and case codes
http://www.zelek.com/diagram_charts/diagramlist.htm
http://www.zelek.com/diagram_charts/diagramlist.htm
I believe you are right. I get them confused...
Are the gear stacks interchangeable? Say my transmission has a stripped bolt hole, could I put the 5 speed guts into the 6 spd case?
nkgagne
Veteran Member
- Joined
- Sep 30, 2010
- Location
- Kitchener, Ontario Canada
- TDI
- 2015 Sportwagen 6M, 2006 Golf GLS TDI (sold)
Neither the 02A nor the 02J that succeeded it were ever offered in a six-speed configuration. These are both five-speed transmission codes.
The nearest relative is the 02S, which is basically the 02J with a longer end case and a sixth gear stuck on the end. Eurotuning.cz also offers a kit to convert the 02A/J to this setup. It isn't any stronger than an 02A/J, but that's only important if you have big power modifications.
The most common six-speed to be swapped in is the 02M, which is a completely different transmission. It uses three shafts, which makes for a shorter length from flywheel to case end than the 02S, and allows the gearbox to use a different final drive for gears 5 and 6 than gears 1-4. It also uses a larger diameter clutch which handles more torque, and the box is also more torque-friendly. Unfortunately, it also uses different axles, the aforementioned larger clutch isn't compatible with the 02A/J setup (i.e. you'll need a new one), a more problematic slave cylinder which requires dropping the gearbox to swap, and a shift fork design which doesn't take kindly to ham-fisted shifting.
The nearest relative is the 02S, which is basically the 02J with a longer end case and a sixth gear stuck on the end. Eurotuning.cz also offers a kit to convert the 02A/J to this setup. It isn't any stronger than an 02A/J, but that's only important if you have big power modifications.
The most common six-speed to be swapped in is the 02M, which is a completely different transmission. It uses three shafts, which makes for a shorter length from flywheel to case end than the 02S, and allows the gearbox to use a different final drive for gears 5 and 6 than gears 1-4. It also uses a larger diameter clutch which handles more torque, and the box is also more torque-friendly. Unfortunately, it also uses different axles, the aforementioned larger clutch isn't compatible with the 02A/J setup (i.e. you'll need a new one), a more problematic slave cylinder which requires dropping the gearbox to swap, and a shift fork design which doesn't take kindly to ham-fisted shifting.
Thank you for the clarification and good info! So if one wasn't worried about any difficulty of installation or access, and didn't do the whole ham fisted shifting thing, is the car streetable with this transmission in it? Basically that's what I'm looking for. I can find gear ratio numbers, etc but I'm really not familiar enough to be able to do anything intelligent with them. Looks like I may have to say hell with it and swap it and find out.
I can always put the 5 spd back in if it sucksnkgagne
Veteran Member
- Joined
- Sep 30, 2010
- Location
- Kitchener, Ontario Canada
- TDI
- 2015 Sportwagen 6M, 2006 Golf GLS TDI (sold)
The car is very "streetable" (or so I'm told - I'm on a very "If it ain't broke..." budget).
The 02M and 02S were offered in Europe on TDI's. You'll want to ensure you pick up a gearbox that was meant for diesels, as the transmissions for gas-engined cars aren't geared tall enough (too much RPM for not enough speed). Look up users ryanp and frans who ship these gearboxes from Europe to the U.S. all the time. Only if you put a box in with the gasser rations will it "suck".
You can recoup some of your costs by selling your TDI ratio gearbox, possibly to someone with a gasser. The 2.sl0w gasser five-speed Mk4 Jetta and Golf (and NB) were sold with criminally short gearing. The TDI 02J box drops right in and makes it bearable at highway speeds, if a little (more) sluggish around town.
The 02M and 02S were offered in Europe on TDI's. You'll want to ensure you pick up a gearbox that was meant for diesels, as the transmissions for gas-engined cars aren't geared tall enough (too much RPM for not enough speed). Look up users ryanp and frans who ship these gearboxes from Europe to the U.S. all the time. Only if you put a box in with the gasser rations will it "suck".
You can recoup some of your costs by selling your TDI ratio gearbox, possibly to someone with a gasser. The 2.sl0w gasser five-speed Mk4 Jetta and Golf (and NB) were sold with criminally short gearing. The TDI 02J box drops right in and makes it bearable at highway speeds, if a little (more) sluggish around town.