Traction Lock & Gears

whats the deal, im about to do gears also. already have the 3.73 and they would be in already if i wasnt getting so confused.

my boy told me to upgrade everything, says: get the eaton trac loc, and stronger axles. on this site i see alot of guys with the eaton setups and axels, both 31 and 28 spline.

now i hear our car already has trac lok. OK thats fine. i also hear that an eaton unit is not as strong as stock for cornering? is this true...

what do i have to do, just put the gears in the stock houseing or upgrade everything? i dont care about cost if i have to wait to do it right i will. i want a strong rear end bottom line strait line cornering whatever.

I loved the 4.10s, just with the jmod and how the SuperChips MicroTuner stiffens up the shift points as well (used it to calibrate the speedo) I get a slight driveshaft knock at low RPMs. Nothing bad but it gets annoying. And the 31 splines made the 8.8 so much stronger, I broke the stockers with just bolt ons so I upgraded the bad boy. I was happy I did. (Miss the car already...) The cooler seemed to be effective once I strigthened out the line plumbing issue I had. The tranny would get real warm when I first put the cooler on, but I used some flexi-hose as the feed lines, it wound kink and bind up so I measured and bent some stainless steel lines and it freed it up awesome and kept her super cool.

John

Fords Trac-lok is the same as GM's posi traction only a different name.

The 31 spline 8.8 trac-lok that FRPP sells(pn# M-4204-F318) in the same one that goes into the production F-150, Navigator, Expedition, and some Rangers,Explorers and Sport Tracs. Some trucks get the M-4204-318O open differential. Pn# M-4204-F318C came in the 03-04 Cobras. Only difference is the cluthch plates in the F318C are carbon fiber .

The 28 spline Trac-lok (pn#M-4204-F288) is what come in the GT's,Mach1's,Bullitt's, Marauders from the factory.

New Mustangs get the 31 spline Trac-lok.

31 spline axles are about 3X stronger (if not more) than 28 splines

Well worth the little money it cost to upgrade.

So Get the cooler, splines, and gears. 4.10's

UDTBadkarma-I've had 3.73s for two years now and I love them. 5th gear has plenty of power on the highway now, and I can still do 30-35 mph in 1st gear for those quick jaunts into traffic.

The 3650 in the '02GT has a .62 5th gear ratio.

Trinity gt - Just curious if you've had the TSB done on your 3650?