DIY diff cooler?
Thread Starter
Burning Brakes
Joined: Mar 2012
Posts: 877
Likes: 6
From: Cherry Hill NJ
DIY diff cooler?
Anyone ever do a DIY diff cooler? First event this past weekend after a complete rebuild. Hitting 300 on the diff but trans is fine at 230. Pocono FUSA so it was tough on both, lots of shifting and the whole back section is like a second gear autocross.
Was thinking some type of scavenge pump, with a cooler/fan combo. Pull/return from the drain/fill plugs or tap the diff case?
Looks like assembling the parts myself will cost 1/2 to 1/3 the price of the popular kits.
Thanks,
Was thinking some type of scavenge pump, with a cooler/fan combo. Pull/return from the drain/fill plugs or tap the diff case?
Looks like assembling the parts myself will cost 1/2 to 1/3 the price of the popular kits.
Thanks,
Burning Brakes
Joined: Dec 2007
Posts: 1,085
Likes: 0
From: San Diego
Anyone ever do a DIY diff cooler? First event this past weekend after a complete rebuild. Hitting 300 on the diff but trans is fine at 230. Pocono FUSA so it was tough on both, lots of shifting and the whole back section is like a second gear autocross.
Was thinking some type of scavenge pump, with a cooler/fan combo. Pull/return from the drain/fill plugs or tap the diff case?
Looks like assembling the parts myself will cost 1/2 to 1/3 the price of the popular kits.
Thanks,
Was thinking some type of scavenge pump, with a cooler/fan combo. Pull/return from the drain/fill plugs or tap the diff case?
Looks like assembling the parts myself will cost 1/2 to 1/3 the price of the popular kits.
Thanks,
Drifting
Joined: May 2001
Posts: 1,651
Likes: 13
From: Holly MI
I've done it on my track car which uses a C5 diff. It's pretty straight forward as far as the fittings go. The drain and fill are the same thread, I believe they are 20mm. Summit/Jegs carries the metric to AN fittings, hoses, pumps, and fluid coolers. The only tricky part is mounting the pump and coolers and wiring it up.
Ken
Ken
Safety Car
Joined: Jan 2005
Posts: 3,781
Likes: 14
From: Phoenixville, PA
Get the metric to AN fittings from Mocal along with the metal/rubber washers for the fill/drain holes. These are odd items, but they have something that will work.
I have my diff cooler triggered of a thermoswitch - depending on the weight of diff fluid you use, you may overwork the diff pump when the fluid is cold.
If you cut the AN lines with a 3" electric cut off wheel ($20 Harbor Freight item), you can probably avoid buying the Khoul Tool.
-6AN lines are plenty. Mocal has high quality hose and fittings and they are very reasonably priced. I would not go any cheaper than those and def avoid Summit/Jeg/no-name items. Red Horse also makes good, inexpensive fittings.
I have my diff cooler triggered of a thermoswitch - depending on the weight of diff fluid you use, you may overwork the diff pump when the fluid is cold.
If you cut the AN lines with a 3" electric cut off wheel ($20 Harbor Freight item), you can probably avoid buying the Khoul Tool.
-6AN lines are plenty. Mocal has high quality hose and fittings and they are very reasonably priced. I would not go any cheaper than those and def avoid Summit/Jeg/no-name items. Red Horse also makes good, inexpensive fittings.
Former Vendor
Joined: Aug 2005
Posts: 16,897
Likes: 412
From: Lewisville TX
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Many don't know this, but even on our full kit you can get some of the pieces to put your own together. You can get just the drive assemblies, in either a single or dual stage pump if you want both trans and diff or just diff.
Not sure how you wanted to run the system, either mechanical or electrical but if you wanted to go mechanical and do most of the work I can get you the bare basics you would need.
Not sure how you wanted to run the system, either mechanical or electrical but if you wanted to go mechanical and do most of the work I can get you the bare basics you would need.
Burning Brakes
Joined: Dec 2007
Posts: 1,085
Likes: 0
From: San Diego
Many don't know this, but even on our full kit you can get some of the pieces to put your own together. You can get just the drive assemblies, in either a single or dual stage pump if you want both trans and diff or just diff.
Not sure how you wanted to run the system, either mechanical or electrical but if you wanted to go mechanical and do most of the work I can get you the bare basics you would need.
Not sure how you wanted to run the system, either mechanical or electrical but if you wanted to go mechanical and do most of the work I can get you the bare basics you would need.
It would have saved lots of time/effort. That being said, I'm SUPER envious of the quality of the parts in your kit. That Pinion nut, pump, and cover are quality pieces.
