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[Bat Fastard]

OK here is your starter for ten points.....
What is the difference between the ratios of a gearbox for a 2.5 diseasel and for a 2.5 petrol?
Both are Jeep units of the same type etc.

Or to put it another way what should I expect if I put the diseasel one in my 99 TJ while I get the original one overhauled?

Answers on a post card etc...

Ta muchly chaps.

[Dingo]

Tell us when you find out . If your just doing it as a tempo, then it'll be worth trying, or do you have to fork out cash for the diesel box?

[monkeybiz]

jeep used the nv3550 as standard on most jeeps after 1999 the diesel has an awsome first gear ratio of 3.12-1 compared with the 3.93 you have at the moment
fun offroad but 5mph 1st gear onroad @3500rpm!!!

teh 4ltr is 3.73 but has 3.07 axles to make up for it

[Bat Fastard]

Hi Gwyn!

You have a very dodgy avatar there mate.
I got your e-mail, but thought I would throw the question to the group.
I like the idea of trying out a mental crawl speed even if it is only for a while. (you never know I might like it or maybe it will slow me down a bit and I might do less damage).

I texted you today on your new moby number.... did you get it?

Hi Dingo..... I have the diseasel box, and would like to try it.
I may still change the oil a couple of times first in the over optimistic hope that the nasty crunchy bit round 3rd gear is taken away by the oil pixies.

[monkeybiz]

yes m8 got the text   still working at 5:30 kos will think you have another woman!!!
you could get round the gearbox problem by going up to 33's or 35's

[Bat Fastard]

33s or 35s...... now you are talking.

I like the sound of this gearbox even more now.
How will the little 4 banger cope with it all?
I am aso bound to rub a bit somewhere with the extra rubber.

Who do I know that has bigger rubber on their TJ that would let me 'borrow' their wheels for a bit?.........hmmmmmmmm.  

[monkeybiz]

sean you are going to need a 4.5" lift for 35's and the 2.5 will handle it just fine but your 5th gears is still .77-1 and 4th 1-1 so you will loose both of them but gain 1st and 2nd....... possibly

there is so little info on the xj diesel gearbox so im afraid its a suck it and see

[monkeybiz]

an old trick years ago when i had my RS turbo (does that make me a chav??) was to replace the gearbox with a diesel van box.
it gave a 0-60 of about 6 seconds but topped out at 100mph

of course i never street raced r5 gt turbos or did 100mph in mine i drove like a grandad to conserve fuel like every 19 year old did

[Anonymous]

Of course  

[Bat Fastard]

Hmmmmmm....
Might have to rethink this one.
I don't want to be popping wheelies in a TJ, or burning spoty youths off at the traffic lights.

Gwyn I am sure you could be called many things, but not a Chav.

[chrisjones]

Hmmmmmm....
Might have to rethink this one.
I don't want to be popping wheelies in a TJ, or burning spoty youths off at the traffic lights.

Are you MAD?? :lol:

[Bat Fastard]

....Probably... but I find the medication helps.