[DeTomaso] Trans cooler

[JDeRyke at aol.com]

The end-mount oil pump was a race team mod (dunno which one), as was 
another pump driven by a vee-belt off the left inboard stub-axle; a race team made 
a pulley adapter. Have the photo somewhere.

As for GT-40 ZF failures during races 45 years ago, at the time their 
dash-zero ZFs used aluminum bearing side-plates like I'm running on our street 
car. Lloyd Butfoy mentioned to me that ZF changed to iron bearing side-plates 
due to the aluminum parts expanding under temp at Daytona 24, Sebring 12 and 
maybe LeMans. The heat slacked off side-gear preload and caused bearing, 
then gear failure. Since he's the authority, I respect his comment. But at the 
temp a street car sees in its ZF lube (I found 180F- hardly enough to 
remove condensation!) I'm not worried about losing my bearings(!) The change lost 
6 lbs of wt. per side and are the early side-plate design with brace bolts 
to the early bellhousing; I don't use the side bolts. There were slightly 
later iron side-plates with angle bolts, too. The change on Judy's car was 6 
or 7 years ago; so far so good.

Another factor, if you're really concerned about ZF lube heating is, 
real-race ZFs used a sprag-type limited-slip similar to a Detroit locker. This 
type of LSD introduces far less heating into the lube than slip-clutch LSDs, 
but were supplanted by the three different types of clutch-type LSDs anyway. 
Lloyd says no parts available for the locker-ZFs. I know of one pushbutton 
Pantera (ZF dash 1-1/2) and one early Mangusta (ZF dash-1) that got this type 
of locker in a street car. Dunno if either are still running it today. 
Illustrations are in the appropriate ZF Manuals.    FWIW- J DeRyke