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Engine Specific Info and Questions => IDI Engine => Topic started by: 1.9TD Caddy on November 05, 2009, 07:02:12 am

Title: CV Drive shafts 90mm to 100mm swap
Post by: 1.9TD Caddy on November 05, 2009, 07:02:12 am: Hello All,
I am installing an 5 speed ACH transmission in my 81 rabbit P/U diesel. The new tranny has the 100mm drive flanges. What drive shafts will work on the Rabbit P/U with an ACH 100mm drive shaft flange tranny. I am thinking of going over to the local scrap yard and pulling the drive shafts of off a 5 speed 1986 Jetta. Will it work?
Thanks!
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: Rabbit on Roids on November 05, 2009, 07:17:42 am: mk1 drive shafts fit in MK1's the only bolt in shaft you can use is out of a 16v scirocco. or just put some 100mm inners on the axles you already have. thats what i did. took a trans and inner cv joints from a 92 jetta and put them in my 81 rabbit. the inner CV joints will work, the whole jetta/golf axle wont.
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: rodpaslow on November 05, 2009, 08:04:36 am: There is another option with a newer trans, at least in Canada, mk2 85-92 na deisel cars (most) came with 90mm transmission flanges that fit properly with a newer 85 + up 020 transmission. The TD's mostly came with 100mm. I actually have a couple. All you need to do is remove the 100mm flanges and install the 90mm.
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: 1.9TD Caddy on November 05, 2009, 08:29:19 am: Thanks! Great ideas!!! I think I will just swap out the inners.
Thanks!
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: MizpahPAH on November 05, 2009, 05:05:37 pm: Do you'all replace the C clips that hold the flanges to the output shafts on the trans each time or are they resuable
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: GEE-BEE on November 05, 2009, 06:17:51 pm: I had to do the opposite with my 100 mm new axle's, my trans was 90 mm , so I purchased some new 90mm inners

So i have a new set of 100 mm's now

1981 mk1 Caddy, I purchased new 100 mm axles for a 16v Scirocco

Gee-Bee
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: 1.9TD Caddy on November 06, 2009, 04:34:21 am: Just curious. What year 16v scirocco drive shafts will fit 1981 caddy with 100mm drive?
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: Rabbit on Roids on November 06, 2009, 08:04:28 am: ANY scirocco with a 16V. im not sure of exact years. i know that the 16v didnt come out till 86 tho.
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: GEE-BEE on November 06, 2009, 09:42:31 am: CORRECT !
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: arb on November 06, 2009, 01:03:37 pm: Quote from: MizpahPAH on November 05, 2009, 05:05:37 pm
Do you'all replace the C clips that hold the flanges to the output shafts on the trans each time or are they resuable

I reused mine, but its only been a few months.
Title: Re: CV Drive shafts 90mm to 100mm swap
Post by: Rabbit on Roids on November 07, 2009, 07:12:51 am: i never re used my clips. when i did my conversion, i had 92 Jetta inner CV joints. not 80's 16v scirocco. i had to tack weld my CVs to my axles. they were just the slightest bit too thick, so i couldnt get the hardware to go on over them. so i put a couple tacks on them. they are not serviceable, but they work like a dream, and dont shake.