TransamGTA350

iTrader: (2)

What are the bolt torque specs for the pinion nut and the carrier bolts for a GM 7.5" rear? I posted this on the Transmission and Rear end board and got no responses. Thanks

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89 Transam GTA, 350TPI, auto, 3.27 rear, dual cats, gray.
Magnaflow cat-back,
K&N open element,
Best E.T. 14.63@95mph

RB83L69

Carrier bolts are about 60 ft-lbs. Pinion nut doesn't have a torque spec, you should expect something in the 150-180 ft-lbs neighborhood, you torque it for correct bearing preload by way of crushing the crush sleeve which is only good for one tightening. You throw it away and put in another if it's not new.

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"So many Mustangs, so little time..."
ICON Motorsports

ede

pinion bearing preload with new bearings is 20-25 in/lbs

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

TransamGTA350

iTrader: (2)

I replaces the crush sleve and the input seal. The bearings were in great shape. 20in/lbs seems kinda light. Are you sure it's not more like 20-30 ft/lbs.?

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89 Transam GTA, 350TPI, auto, 3.27 rear, dual cats, gray.
Magnaflow cat-back,
K&N open element,
Best E.T. 14.63@95mph

RB83L69

The idea is, you torque the pinion nut until it takes that many inch-ponuds to turn the pinion. You're trying to tighten the nut just past the point at which all the play betwen the bearings gets taken up. Like I said earlier, expect something in the neighborhood of 150 ft-lbs on the nut by the time you get the crush sleeve crushed to the right point.

------------------
"So many Mustangs, so little time..."
ICON Motorsports

TransamGTA350

iTrader: (2)

ok, i get it now. Thanks for your help.

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89 Transam GTA, 350TPI, auto, 3.27 rear, dual cats, gray.
Magnaflow cat-back,
K&N open element,
Best E.T. 14.63@95mph