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Model specific boards => Golf mk4 => Topic started by: dan2252 on 04 February 2013, 19:58

Title: Gearbox help
Post by: dan2252 on 04 February 2013, 19:58
My 99 mk4 agu. Has thought it would be nice to blow the diff through the gearbox. So I'm wanting to know what box will fit my car without too much work? I'd like to put a 5 speed diesel box on if possible how much work is involved ? Cheers Danny
Title: Re: Gearbox help
Post by: barrym381 on 04 February 2013, 20:14
1 that's not broke  :grin:
Title: Re: Gearbox help
Post by: dan2252 on 04 February 2013, 22:23
haha, i meant if i change to a diesel box will i have to change the gear cables?
Title: Re: Gearbox help
Post by: xxChrisxx on 04 February 2013, 23:00
My 99 mk4 agu. Has thought it would be nice to blow the diff through the gearbox. So I'm wanting to know what box will fit my car without too much work? I'd like to put a 5 speed diesel box on if possible how much work is involved ? Cheers Danny

Surely a tdi box is going to geared far too long especially in 4th and 5th?
Title: Re: Gearbox help
Post by: dan2252 on 04 February 2013, 23:10
i thought this, but a mate of mine has a mk2 g60 with a mk3 diesel box and it transforms the car, i find 3rd,4th too short in the mk4 standard box thats all :)
Title: Re: Gearbox help
Post by: xxChrisxx on 04 February 2013, 23:22
i thought this, but a mate of mine has a mk2 g60 with a mk3 diesel box and it transforms the car, i find 3rd,4th too short in the mk4 standard box thats all :)

Id just do a bit of number crunching first, with an 02j tdi box you get a 3.3 fd with 0.74 ish 5th gear. With a standard wheel size it puts a 70mph at 2k rpm vs 3.2k for an agu box.

At 2k you really wont have any torque at the wheels at that sort of ratio. It just seems that tad too long.
Just food for thought. There be a box out there with good ratios for what you want.
Title: Re: Gearbox help
Post by: dom on 05 February 2013, 16:26
i thought this, but a mate of mine has a mk2 g60 with a mk3 diesel box and it transforms the car, i find 3rd,4th too short in the mk4 standard box thats all :)

Pretty sure the calculations have been done before Danny and it's worked out that the diesel gearing would be sh!te in a 1.8t. There was a thread on here recently about swapping a 6 speed diesel box into a 1.8t and when the sums were done 5th/6th were going to be no good.
Title: Re: Gearbox help
Post by: golfyste on 05 February 2013, 16:52
Surely 100 in 3rd and 125+ in 4th is long enough??  :undecided:
Title: Re: Gearbox help
Post by: dan2252 on 06 February 2013, 18:56
Naa I don't think 3rd and 4th are long enough mate 3rd should be 115, 120 :) and then top out in 4th, not gonna bother now as I don't want it to be doing 2k at 70mph I'd want it doing about 2800 in a perfect world haha
Title: Re: Gearbox help
Post by: dom on 06 February 2013, 20:08
Surely 100 in 3rd and 125+ in 4th is long enough??  :undecided:

You've not seen him drive :grin:
Title: Re: Gearbox help
Post by: xxChrisxx on 06 February 2013, 21:13
Is it is it the ratio spread or the speed in gear that you aren't happy with? There are 02j boxes with the same ratios but longer final drives.

No idea if they are a straight fit though.