91 Jetta Gear Box
michael
I have a 91 Jetta, 140k with a mint body. What I would like to do is put in a
Lower Gear Ratio.. Currently at 80mph it turns around 3,900.. I am not sure
what the final drive ratio is currently but I've heard that there are
aftermarket gear boxes that would be more efficient .. Has anyone done this
type of conversion? Thoughts? Recommendations? How about a 6spd Box?
thanks..
michael
Henry A Harper III
michael <mpt...@nh.ultranet.com> wrote in article
<60lioi$qn9$1...@decius.ultra.net>...
Hmm. If your tires are standard size, this works out to a 0.84 5th assuming
a 3.67 final as on pretty much every gasoline A2. According to Mr. Bentley,
your actual choices were: 0.91 (for a 16v), 0.89, or 0.75. My 16v GTI had,
of course, the 0.91 and would be going 75 at 4k (both needles straight up).
Then I got a 0.75 6th gear and now 4k is slightly over 90 - or so I assume
from my Excel spreadsheet gear calculator :) Aha! Perhaps you have an
automatic, which is a different Bentley chapter...1.00 3rd, 3.41 final
which gives 72 @ 3900. No, that's not right either.
Here we go. ECO diesel: 0.75 5th, 4.25 final gives 77 @ 3900.
Ok, the diesel has the same tranny case as the gas cars, just different
ratios. So in theory you could indeed get a sixth gear, but I believe 0.75
is about as low as those go, except I heard of a 0.71 in some Scirocco box
- not covered by my Bentley, anyway. I personally would be worried about
having enough power to push a taller gear, it being a diesel. If you get
the taller gear you might end up going slower.
But hey, you can call my favorite 6-speed guy. Vince Locicero, VL
Enterprises in Oregon: 503.628.0510. He did mine, see my car page
http://www.srv.net/~hah/vw for the whole long story.
Henry Harper
1988 GTI 16v 1.8, 171k, VL Option-6 0.75 6th, TT 2.25" cat and
stainless cat-back, Bilstein Sports, euro intake cam, euro-aero H4s, big
bumpers, k&n, new $15-for-the-part-$300-for-labor pressure plate, waiting
for blue plug wires, still playing with the new whompin' stereo,
ticket-me-for-excessive-noise-and-display-of-speed red
(may be joined this week by a '91 Audi 200q...heh heh heh)
michael
In article <01bccc2b$385b5160$377fb4cd@default>, "Henry A Harper III" <h...@srv.net> wrote:
>Hmm. If your tires are standard size, this works out to a 0.84 5th assuming
>a 3.67 final as on pretty much every gasoline A2. According to Mr. Bentley,
>your actual choices were: 0.91 (for a 16v), 0.89, or 0.75. My 16v GTI had,
>of course, the 0.91 and would be going 75 at 4k (both needles straight up).
>Then I got a 0.75 6th gear and now 4k is slightly over 90 - or so I assume
>from my Excel spreadsheet gear calculator :) Aha! Perhaps you have an
>automatic, which is a different Bentley chapter...1.00 3rd, 3.41 final
>which gives 72 @ 3900. No, that's not right either.
>Here we go. ECO diesel: 0.75 5th, 4.25 final gives 77 @ 3900.
>Ok, the diesel has the same tranny case as the gas cars, just different
>ratios. So in theory you could indeed get a sixth gear, but I believe 0.75
>is about as low as those go, except I heard of a 0.71 in some Scirocco box
>- not covered by my Bentley, anyway. I personally would be worried about
>having enough power to push a taller gear, it being a diesel. If you get
>the taller gear you might end up going slower.
>
>But hey, you can call my favorite 6-speed guy. Vince Locicero, VL
>Enterprises in Oregon: 503.628.0510. He did mine, see my car page
>http://www.srv.net/~hah/vw for the whole long story.
>
>Henry Harper
thanxs for the info Henry.
btw- the tires are stock, 185/60/R14 .Oh yah, its a 5spd also..
michael