[DeTomaso] Axle Nut Torque

[Kirby Schrader]

I used to have a 1964 Galaxie....
Old Ford rear-ends (diffs) had a one time crush sleeve to set the  
preload on the pinion bearing.

Unfortunately, every time you'd dump the clutch at 4500rpm with big  
tires on the back, you'd 'crush' it a little more and a little more  
and finally the pre-load was gone, the pinion started moving around  
and your ring gear was toast.

There was a special hardened 'racing sleeve' which had to be chosen  
at the right thickness to get the pre-load and not 'crush' anymore.

Five rear ends later (a 3:50, a 3:50, a 4:11, a 4:57 and a 3:89) I  
had learned the hard way. The last 4:11 lasted many many years.

Old war story....
FWIW,

Kirby


On 10 Apr 2007, at 7:33 PM, F&D Terry wrote:

> Mid -70's Corvette bearings were installed with a one time use crush
> sleeve shimmed to give 3 thousands free play. Been there done that  
> using
> a Corvette shop manual.
>
> Fred T.
>
> JDeRyke at aol.com wrote:
>
>> Good move, Tony- 400 ft-lbs with tapered roller bearings will  
>> sieze and ruin
>> them instantly. That torque is only for BALL rear bearings with an  
>> internal
>> spacer. Converted tapered-roller rear wheel bearings will react  
>> just like
>> over-tightened tapered roller front-wheel bearings & burn up.
>> This bothered me too, so for my rear tapered roller bearing  
>> conversion, I
>> copied the mid-'70s Corvette specs with their rear tapered rollers  
>> and use only 25
>> ft-lbs on the axle nut, with a positive mechanical lock to retain the
>> almost-loose nut. My positive lock is a 1/4-28 allen bolt threaded  
>> clear thru the
>> mating flange, positioned such that the end passes into one of the  
>> nut's stock
>> notches. MIne have held for thousands of miles since '98. The  
>> allen could be
>> further secured with safety wire, but I never added it. Others use  
>> red (or
>> green) Lock-tite on the axle nut and crossed fingers. Good luck- J  
>> DeRyke
>> <BR><BR><BR>**************************************<BR> See what's  
>> free at
>> http://www.aol.com.</HTML>
>> _______________________________________________
>>
>> Detomaso Forum Managed by POCA
>>
>> Archive Search Engine Now Available at http://www.realbig.com/ 
>> detomaso/
>>
>> DeTomaso mailing list
>> DeTomaso at list.realbig.com
>> http://list.realbig.com/mailman/listinfo/detomaso
>>
>>
>>
>>
>>
>
>
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> Archive Search Engine Now Available at http://www.realbig.com/ 
> detomaso/
>
> DeTomaso mailing list
> DeTomaso at list.realbig.com
> http://list.realbig.com/mailman/listinfo/detomaso