Trans Cooler - Land Rovers Only

stb616 · 07-13-2006, 05:44 PM

Has anyone installed a aux. transmission cooler? I'm wondering what a good one to buy would be and if there any install issues I'll run into.

Thanks

oh, on that note what trans fluid is best to use? Can I switch to a full synthetic like merc V?

Disco Mike · 07-13-2006, 06:50 PM

Why do you feel you need an aux. cooler, are you doing any trailor hauling?
As for the coolant, there are synthetic fluids out there that can be used in place of Dextron, Royal purple is doing alot of advertising lately on the fluid. Just remember to get all the fluid out, you have to empty the torque convertor which means doing a complete flush and most shops don't have the adapter needed to do a Rover.
Mike

stb616 · 07-13-2006, 07:27 PM

I hadn't thought about any adapters for a flush, good point.

Heat is number one reason for fluid breakdown, less heat = less breakdown. I do tow at times not all the time, but enough I suppose. I Know you can get a decent cooler for about $75 but I don't know the fitting size in a disco and haven't had any luck finding a cooler so far.

6cuda6 · 07-13-2006, 08:12 PM

Does your truck have the towing package??? It may already have one.....
Do you live in an area that gets really cold in the winter?? Not the best for the trans either....

later, Dean

Rovin4life · 07-15-2006, 10:40 AM

Actually we use BG transmission service. Solves both problems at once.

on a 60k service since you just drop the plug and refill we decided to go with BG instead. Basically you end up changing all the fluid instead of a few qts.

And also its cleaner and faster.

All you do is hook into the line at the radiator and hook the BG transmission machine in line and with the line pressure of 60psi the truck does all the work in less then twenty minutes flat. Its that easy.

You see with a low line pressure like in a few trannies made for Ford and Jag they have a line pressure of ten psi. Not good if you want to change the fluid quickly. It can take almost an hour to change. You need to pump the RPMs to get it go a bit quicker. But with an additional pump on newer BG machines it still isnt that fast.

Also too we add protectant in the fluid. Works great for seals and other stuff. Solves torque shudder in Fords by leaps and bounds.

They do have cleaner with the package but we only put the stuff in if there is a dipstick. Thats what we did with Fords too. If no dipstick then just swap the fluid and add the protectant. If it was a regular 30k it wasnt as bad. If the fluid was black it was a tossup and usually we hunkered down and put it in the tranny even though it was a pain.

By the way the fluid for a LR3 costs fifty bucks a quart and takes sixteen.
Not cheap by any means.

Disco Mike · 07-15-2006, 06:59 PM

What type of fluid does an LR3 tranny call for?
Mike

Rovin4life · 07-17-2006, 05:20 PM

Its Jag fluid and its some real special Mineral oil.

07-13-2006, 05:44 PM	#1 (permalink)
stb616 Member Join Date: Mar 2006 Posts: 79 Gallery: 0	Trans Cooler Has anyone installed a aux. transmission cooler? I'm wondering what a good one to buy would be and if there any install issues I'll run into. Thanks oh, on that note what trans fluid is best to use? Can I switch to a full synthetic like merc V?

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07-13-2006, 06:50 PM	#2 (permalink)
Disco Mike Moderator Join Date: Aug 2004 Location: Parker, Colorado Posts: 5,786 Gallery: 0	Why do you feel you need an aux. cooler, are you doing any trailor hauling? As for the coolant, there are synthetic fluids out there that can be used in place of Dextron, Royal purple is doing alot of advertising lately on the fluid. Just remember to get all the fluid out, you have to empty the torque convertor which means doing a complete flush and most shops don't have the adapter needed to do a Rover. Mike

07-13-2006, 07:27 PM	#3 (permalink)
stb616 Member Join Date: Mar 2006 Posts: 79 Gallery: 0	I hadn't thought about any adapters for a flush, good point. Heat is number one reason for fluid breakdown, less heat = less breakdown. I do tow at times not all the time, but enough I suppose. I Know you can get a decent cooler for about $75 but I don't know the fitting size in a disco and haven't had any luck finding a cooler so far.

07-13-2006, 08:12 PM	#4 (permalink)
6cuda6 Senior Member Join Date: Apr 2006 Posts: 299 Gallery: 0	Does your truck have the towing package??? It may already have one..... Do you live in an area that gets really cold in the winter?? Not the best for the trans either.... later, Dean

07-15-2006, 10:40 AM	#5 (permalink)
Rovin4life Former NAS LR TECH, Current AUS LR TECH Join Date: Oct 2005 Location: DOWN UNDER Posts: 1,884 Gallery: 0	Actually we use BG transmission service. Solves both problems at once. on a 60k service since you just drop the plug and refill we decided to go with BG instead. Basically you end up changing all the fluid instead of a few qts. And also its cleaner and faster. All you do is hook into the line at the radiator and hook the BG transmission machine in line and with the line pressure of 60psi the truck does all the work in less then twenty minutes flat. Its that easy. You see with a low line pressure like in a few trannies made for Ford and Jag they have a line pressure of ten psi. Not good if you want to change the fluid quickly. It can take almost an hour to change. You need to pump the RPMs to get it go a bit quicker. But with an additional pump on newer BG machines it still isnt that fast. Also too we add protectant in the fluid. Works great for seals and other stuff. Solves torque shudder in Fords by leaps and bounds. They do have cleaner with the package but we only put the stuff in if there is a dipstick. Thats what we did with Fords too. If no dipstick then just swap the fluid and add the protectant. If it was a regular 30k it wasnt as bad. If the fluid was black it was a tossup and usually we hunkered down and put it in the tranny even though it was a pain. By the way the fluid for a LR3 costs fifty bucks a quart and takes sixteen. Not cheap by any means.

07-15-2006, 06:59 PM	#6 (permalink)
Disco Mike Moderator Join Date: Aug 2004 Location: Parker, Colorado Posts: 5,786 Gallery: 0	What type of fluid does an LR3 tranny call for? Mike

07-17-2006, 05:20 PM	#7 (permalink)
Rovin4life Former NAS LR TECH, Current AUS LR TECH Join Date: Oct 2005 Location: DOWN UNDER Posts: 1,884 Gallery: 0	Its Jag fluid and its some real special Mineral oil.

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