Trans Cooler Opinions

[d2dave]

I wish to upgrade my transmission cooler. Either by adding an extra cooler or using an Allisport one.

Allisport claim that it has three times the cooling capacity of original.

These are a bit pricey, but cost does not worry me if their claims are true.

If they are as good as they claim, I think this would be the best option.

Thoughts please.

Discovery 2 Td5 auto gearbox oil cooler - AlliSport (https://www.allisport.com/shop/performance-products/oil-coolers/discovery-2-td5-auto-gearbox-oil-cooler/)

[Tombie]

P38 units are a good upgrade.

[d2dave]

Are they a bolt in or are mods needed?

I assume a larger unit?

[Matt_Rides]

Are they a bolt in or are mods needed?

I assume a larger unit?

How did you go? I'm looking at upgrading the cooler to tow a 3000kg caravan. Been quoted $1300 to supply and fit a secondary unit and service the transmission.

[shack]

How did you go? I'm looking at upgrading the cooler to tow a 3000kg caravan. Been quoted $1300 to supply and fit a secondary unit and service the transmission.I believe the p38 cooler is pretty easily fitted, I've got one in one of my D2s and at the time thought it was a decent option... It probably still is, but it's a long time ago, I think the fittings might need modifying and the mount on the end bending.

What I have said before and will say again is if you are able to run a tune/ turbo/ intercooler that allows you to.. At the very least run in lockup in 3rd, you will probably not have too many heat issues.
Anyone on here that has temp monitoring of the trans will be able to confirm the exponential nature of heat increase when towing but not locked up.

I wouldn't guarantee that a bigger cooler will entirely overcome not running in lockup.

Just based on what I've experienced.

Btw, The p38 cooler replaces the original.

[Slunnie]

I'd recommend this one. The factory location just has the ATF cooler filling up with mud and you cant clean them out easily This one always stays clean and if not then its easy to clean out.

Aux Transmission Oil Cooler | MODIFICATION | Davis Performance (https://davisperformance.com.au/aux-transmission-oil-cooler.html)

[RRT]

P38 units are a good upgrade.

Am going down this P38 route and just have to get the hoses done (does anybody have the dimensions of the replacement pipe etc????)

Range Rover P38 Engine Oil Cooler Radiator ESR3205 NEW 1995~2002 4.6L | eBay (https://www.ebay.com.au/itm/251370452177?_trkparms=aid%3D1110006%26algo%3DHOME SPLICE.SIM%26ao%3D1%26asc%3D20201210111314%26meid% 3D306ca1cdf54544ba87e71053586c91c9%26pid%3D101195% 26rk%3D3%26rkt%3D12%26sd%3D153414845385%26itm%3D25 1370452177%26pmt%3D1%26noa%3D0%26pg%3D2047675%26al gv%3DSimplAMLv9PairwiseWithPLXWeb%26brand%3DBritpa rt&_trksid=p2047675.c101195.m1851&amdata=cksum%3A251370452177306ca1cdf54544ba87e7105 3586c91c9%7Cenc%3AAQAGAAACAEDoE%252B4QPJlBAd8Y6DJY dLxc0R6LiBLw2TfNn3Pa9RXiZF7wXcGs5EeNe6Ib8FOat2Yinm 1NTvDcAlYGKSy1rjPbR6rfue2a1FfErI35dR0CQNmKJdc4cKhK P2ib2KW6HC4qz9gpJyzEuWrXjLcB0TGmwgHbyJ9w7Wn9OrwMxX A65HmWBsbcZt0GrcQPta6eIVtYL7yl3FOJLLOH%252F7VITaA4 EnKb8zge2QKsHCCptNIx0F2Xqw9MEHPiu3wF5g7WyjnwpA0u%2 52BEpR31SmDchfaPlMvrbfgDA3E9vFSuQi1nvDP7z19N%252FM bv28QnA0PXi47QHAjneL3rR3Bk0bukCp9YjjYV9Xci8Q%252BB Irne%252BjLYKMDKBGDNDJ6Ntu45gPHkBQeHIrSG6jucf4mkmk rPcn6nosLhA6EcGVSSYcEkmHC%252FpcpL%252FqO4lWyfHTUW 2gq1vrwQuufiGxaTj%252BjofgckWC%252FMohazbjO4tY%252 FVhRbysZnwjoQMrhsKv%252F2By%252FQMccOPhk%252B2ot1u DjOshmb8WXon2PNOCwsdR2ykZEw2PAp8%252BK8lYpx%252B2n %252FUuY6hW9WIotfGWYsRHZ7ZlvwkrmtCN7ERooR8bsxsRGKK TIDZz7uZ6d%252FPVC%252BfljSsAqXVKDSt2epavK5gdPJA%2 52FvVc1a%252Fg4udVNIe2laZwysvxuoYM2y%252FzLBqPS%25 2B%7Campid%3APL_CLK%7Cclp%3A2047675&epid=864001541)

Back when I was looking at the options, add on, replacement and clean, P38, custom etc

The P38 has I was informed has about twice the cooling capacity of the D2 which I think is a better compromise as to not getting it TOO COOL as with 3 times the Alisport claim - too cool is as bad as too hot. Whilst the Alisport has standard D2 clip ons, rightly or wrongly like the idea of the screw connectors as I wish to upgrade the whole system not just the cooler.

As from the ebay link above, the cost landed would be about - $450 delivered to your door and plus of course the cost of the hoses - have got one of their front drives shafts and it is a very nice piece of kit
-https://www.bputah.com/Disco2%20Parts/Land_Rover_Discovery_Front_Drive_Shaft.htm - just don't let it drop on your foot, it hurts for a very long time

[Matt_Rides]

I believe the p38 cooler is pretty easily fitted, I've got one in one of my D2s and at the time thought it was a decent option... It probably still is, but it's a long time ago, I think the fittings might need modifying and the mount on the end bending.

What I have said before and will say again is if you are able to run a tune/ turbo/ intercooler that allows you to.. At the very least run in lockup in 3rd, you will probably not have too many heat issues.
Anyone on here that has temp monitoring of the trans will be able to confirm the exponential nature of heat increase when towing but not locked up.

I wouldn't guarantee that a bigger cooler will entirely overcome not running in lockup.

Just based on what I've experienced.

Btw, The p38 cooler replaces the original.


Great tips. The car I got from my dad was tuned when the warranty expired and never saw a hard day in its life until I got my hands on it a few weeks ago. Plan on running the stock cooler and another one to supplement the stock one. Trans will also be serviced. Just getting a feel for when the trans locks up when towing loads up hill so when I put the 3000kg van on the back, I can adjust my driving style to suit. We are making the trip from Melbourne to Perth so once we are on the open roads, its not going to be too bad.

[Matt_Rides]

I'd recommend this one. The factory location just has the ATF cooler filling up with mud and you cant clean them out easily This one always stays clean and if not then its easy to clean out.

Aux Transmission Oil Cooler | MODIFICATION | Davis Performance (https://davisperformance.com.au/aux-transmission-oil-cooler.html)

Thats not bad. Is this what you have fitted?

[Slunnie]

Thats not bad. Is this what you have fitted?

Yes, I cant speak more highly of it. Every other one I tried blew apart somehow - where the lines connect into them. This one has never had any problems and it always stays clean. In the factory location they fill with mud and the air stops flowing through them, so they stop cooling. I was having a lot of problems with the auto for a few reasons, mud and an ECU/Intercooler upgrade which put more power through the auto and so the temps were destroying it. If the transmission light came on, the gearbox was going to need another rebuild in the near future which costs thousands. Since this ATF cooler was fitted and 3rd & 4th clutch packs fitted from a ZF 4HP24, the auto has never flinched. I had that particular ATF cooler installed in early 2006, so 15 years ago. This ATF cooler sits behind the grill which is up and out of the way and accessible. It still allows airflow around it to the radiator pack.

Just some pics.

The factory ATF cooler sits behind the A/C condensor, under the intercooler and infront of the radiator, so you cant access it clean it. I have a special radiator cleaning wand and it cant ever get in there to clean the factory ATF cooler

http://www.slunnie.com/coppermine/albums/userpics/Transmission%20Coolers/normal_001.jpg http://www.slunnie.com/coppermine/albums/userpics/Radiator%20cleaning%20wand/normal_P1010019.JPG

I've tried the tube and fin ATF Coolers as pictured, plate and fin ATF coolers and the 2 different styles of additional cooler and both failed before they got too far. The problem is actually the pressure from the ZF which is far higher than other auto's and if the ATF lines are just slip on and hose clamp connections, even with flares then they blow apart. The must be proper multibarb connections such as those used by Pirtek etc.

http://www.slunnie.com/coppermine/albums/userpics/Transmission%20Coolers/normal_004.jpg

This is where the Davis Performance one mounts, it is behind the grill rather than on the radiator pack. This allows air to flow through it for cooling, around it for the radiator pack also and it has proper pressure fittings as stacked plate coolers do. I suspect that even if the factory ATF cooler becomes clogged with mud again that this one will continue to provide enough cooling. I run the OEM and DPL coolers in series and the auto loves it.

http://www.slunnie.com/coppermine/albums/userpics/normal_P5080037a.jpg

[Matt_Rides]

Yes, I cant speak more highly of it. Every other one I tried blew apart somehow - where the lines connect into them. This one has never had any problems and it always stays clean. In the factory location they fill with mud and the air stops flowing through them, so they stop cooling. I was having a lot of problems with the auto for a few reasons, mud and an ECU/Intercooler upgrade which put more power through the auto and so the temps were destroying it. If the transmission light came on, the gearbox was going to need another rebuild in the near future which costs thousands. Since this ATF cooler was fitted and 3rd & 4th clutch packs fitted from a ZF 4HP24, the auto has never flinched. I had that particular ATF cooler installed in early 2006, so 15 years ago. This ATF cooler sits behind the grill which is up and out of the way and accessible. It still allows airflow around it to the radiator pack.

Just some pics.

The factory ATF cooler sits behind the A/C condensor, under the intercooler and infront of the radiator, so you cant access it clean it. I have a special radiator cleaning wand and it cant ever get in there to clean the factory ATF cooler

http://www.slunnie.com/coppermine/albums/userpics/Transmission%20Coolers/normal_001.jpg http://www.slunnie.com/coppermine/albums/userpics/Radiator%20cleaning%20wand/normal_P1010019.JPG

I've tried the tube and fin ATF Coolers as pictured, plate and fin ATF coolers and the 2 different styles of additional cooler and both failed before they got too far. The problem is actually the pressure from the ZF which is far higher than other auto's and if the ATF lines are just slip on and hose clamp connections, even with flares then they blow apart. The must be proper multibarb connections such as those used by Pirtek etc.

http://www.slunnie.com/coppermine/albums/userpics/Transmission%20Coolers/normal_004.jpg

This is where the Davis Performance one mounts, it is behind the grill rather than on the radiator pack. This allows air to flow through it for cooling, around it for the radiator pack also and it has proper pressure fittings as stacked plate coolers do. I suspect that even if the factory ATF cooler becomes clogged with mud again that this one will continue to provide enough cooling. I run the OEM and DPL coolers in series and the auto loves it.

http://www.slunnie.com/coppermine/albums/userpics/normal_P5080037a.jpg
That's awesome. Is making me consider doing it myself rather than getting someone else to do it. How did you mount it if you don't mind me asking?
If it's all bolt on then it shouldn't be too hard to do.

[Pedro_The_Swift]

How did you go? I'm looking at upgrading the cooler to tow a 3000kg caravan. Been quoted $1300 to supply and fit a secondary unit and service the transmission.

Not sure how the end price stacks up,, all I know is my way works from several years of testing..
every part was considered from the internal hose size to why you need an extra cooler..and the whole deal is in here,, from part numbers to final install pics.

Do yourself a favour and search here,,

[Matt_Rides]

Not sure how the end price stacks up,, all I know is my way works from several years of testing..
every part was considered from the internal hose size to why you need an extra cooler..and the whole deal is in here,, from part numbers to final install pics.

Do yourself a favour and search here,,

Is there meant to be a link in your post or did you mean search the forum?