upgrading auto trans cooler?

[that_kid]

hi all

Im about to install twin lockers and 4.1 crown wheel and pinions into my d2 and im wondering weather upgrading the trans cooler is going to be important. I am running the 4.1 gears to pre-empt the purchase of 35" tires down the line and while i had all the bits out it seemed like the smart thing to do. It currently runs 32"s on it at the moment but my main concern is with the change in gearing it will tend to be revving harder on the highway but also its going to be doing alot more crawling etc. I think its just a good preventitive measure but what is the best way to go about it?

Its a TD5 auto too btw.
:)
cheers

[Pedro_The_Swift]

You can get aftermarket coolers,,
but dont the 4.6RR coolers bolt in?

[Slunnie]

I wouldn't bother, the tyres and gearing wont make any real differnce to it. I would recommend one if you play in mud and most definately if you chip it. You may also want to correct the speedo as I'm pretty sure it will affect the lockup point in the auto.

[justinc]

....And especially if you immerse the front of your vehicle in slop as per the avatar pic, you will very soon find a cooked trans as at the level of mud in the pic your auto cooler is about 100mm from being under water/ mud. the mud then bakes hard and presto, one cooked and useless trans. Just ask Slunnie about this phenomenon...:(

I would definately truespeed it, as the trans ECU calculates lockup points from actual road speed inputs, unlike a hydraulic auto that locks up as per governor(output shaft) speed.

JC

[Slunnie]

....And especially if you immerse the front of your vehicle in slop as per the avatar pic, you will very soon find a cooked trans as at the level of mud in the pic your auto cooler is about 100mm from being under water/ mud. the mud then bakes hard and presto, one cooked and useless trans. Just ask Slunnie about this phenomenon...:(

I would definately truespeed it, as the trans ECU calculates lockup points from actual road speed inputs, unlike a hydraulic auto that locks up as per governor(output shaft) speed.

JC
Oooh yeah, I've spent a lot of time and money on these transmissions trying to sort them. :(

[that_kid]

ok thats been alot of help thanks for that, ill have to look into the truspeed issue pretty quick. does changing the dif rations not help with adjusting the indicated speed? (n00b question) i do play in the mud a bit but that pic was the day i got it and was indestructable, which i quickly learnt wasnt true.

Who does the truspeed units locally?

[justinc]

ok thats been alot of help thanks for that, ill have to look into the truspeed issue pretty quick. does changing the dif rations not help with adjusting the indicated speed? (n00b question) i do play in the mud a bit but that pic was the day i got it and was indestructable, which i quickly learnt wasnt true.
Who does the truspeed units locally?

:D:D:D:D:D

...aint that sometimes the truth:p
Google Truspeed, (sp?) They do have an australian distributor I'm certain.

JC

[Slunnie]

:lol2:

Simon and Michael from 4x4Intellgence are the Australian distributors. They are in Melbourne.
4x4Discovery.com.au - "think outside ..." (http://www.4x4intelligence.com.au/)

The diff ratios wont also the speedo. The D2 is a bit special in that everything that has a speed relation - ie speedo, TC lockup, ACE, SLS, Cruise control, auto door locking etc they all pick up the speed from a signal that is generated by the SLABS computer. The SLABS computer generates the speed signal based on the feedback from the 4 ABS sensors. So basically no. Changing gearing on the D2 does not alter the speedo.