Thread: auto got hot, is it now wrecked?

Talked to a motor mechanic friend with a lot of experience. His opinion is that the black sludge in the trans filter was a product of the oil breakdown when it got hot. Recommends that you have a filter change and transmission flush, ie, a trans fluid change where all the fluid, including the torque converter is changed. Might need a trans shop to do that.
Main thing is fitting a larger trans cooler, as it seems that the original cooler is not big enough to cope with the amount of heat from the trans.
Or consider a manual transmission; as a heavy vehicle towing a lot of weight, might be too much for that auto trans.

Hi All,
After literally heaps of research i have located a factory rebuilt zf4hp24. it's a 065 suffix box which I believe is identical length to my knackered hp22.
Before I push the go button and hand over my cash, can anyone answer my last couple of questions...
Will my early D2 cdl equipped transfer box fit the output housing and shaft of this auto?
Will my standard 2004 td5 auto trans ECU connect and run this box?
This box comes with a medium size 2400 rpm stall speed torque converter modified to suit the td5 motor. Will this be OK?
lastly, I have another standard trans cooler that I plan to add in series with the original to protect my investment.
I was thinking of up behind the front grill, this will be higher than the standard one, should I plumb it in before or after? Will the trans pump fluid thru both happily?
I plan on using the new coolers temp sender location to add in a trans cooler gauge. probably a madman or similar. Eventually I will monitor engine coolant temp, trans temp and egt.
Any thoughts or ideas I have missed?
cheers matt

lots of posts on extra trans coolers,, I doubt it matters which way you plumb it,, yes they seem to pump through both happily,
more important to check all the trans line connections for movement/leakage.
temps should be taken as close to the box as possible.

Originally Posted by muddymatt

I was thinking of up behind the front grill, this will be higher than the standard one, should I plumb it in before or after? Will the trans pump fluid thru both happily?
I plan on using the new coolers temp sender location to add in a trans cooler gauge. probably a madman or similar. Eventually I will monitor engine coolant temp, trans temp and egt.
Any thoughts or ideas I have missed?
cheers matt

The additional ATF cooler is a very good move! I've had no transmission problems since going to this setup in 2008, but you must use proper multibarb pirtek type fittings and coolers, not push on and hose clamp fittings as they will burst off every time. One of the ATF lines has just been interupted by the cooler, so the ATF goes through both coolers.

Thanks heaps for the cooler answers.
Any ideas on the other questions?
cheers matt

Originally Posted by muddymatt

Any ideas on the other questions?
cheers matt

yea,,
where did you get the 24 box?

Originally Posted by Pedro_The_Swift

yea,,
where did you get the 24 box?

hahaha I'll tell you that AFTER I get it fitted and working....

I know it has been done before by roarin8 amongst others and the 24 was factory fitted to NAS 4.6 d2a but what I really need to know before I have over the cash is will my trans ECU connect and operate it?

Do we have a trans ECU?


and if we do,,,
it does ****all telling us stuff!!