Drag Racing Discussions > Front Engine Dragsters

Gear oil and tranny/rear end support

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DNCMOTORS:
Looking to see what people run for rear gear oil?  I have a Ford 9" with Mark Williams third member with the big pinion support.  Also, I spoke with a few drivers who recommended a solid bar or support running from the third member forward to the tranny some place to reduce flexing between the two.  Is this something that everyone else does? Thanks in advance. 

wideopen231:
Far from expert,more of want to be rookie. I believe you will find that running support from rear to trans or engine if that what you are asking about ,will just cause handling or breakage issues. The design of the drivers compartment will eliminate the flex part. Car has to have some flex to work and chassis from motor plate forward it has plenty. When we ran TA?FC they made rule about diagonals in floor section. We had a very reputable chassis builder install some. Result first DNQ in 4 years for first race,second race we where not NQ 3rd qualifier. Did some thinking. Took porta band and cut the bars with  a thong(like tuning fork).Result 4th shot early shut off number 2 qualifier.

  HAd cpl friend who bought a TF/FC chassis to run TA/FC.  did not work  worth crap.Was to stiff for power. Built for 8000 hp and 3000 hp was not enough to make it work. Pretty sure Roo man or Bruce will chime in. and give you lot better info and heck probably tell me I am full off,well you know.LOL

rooman:
A lot of Super Comp style cars run what I think your mates are talking about. It is generally a couple of heim jointed links that run from a mount on the pinion support to a similar device on the back of a shorty powerglide. It does not affect the chassis rigidity but it does take some of the longitudinal axis load off the mid plate at the step. I have also seen cars with a more rigid arrangement , generally a couple of tubes from mounts on the upper frame rails to brackets attached to the upper bellhousing bolts.

Roo

dreracecar:
Fuel cars mandate/require blowback struts/tubes as per rules and are sloppy fit to allow flexing, In what we do and run on the sportsman level, do not require any extra support and tend to prefer a little flexibility over rigid

gregm784:
I have a standard Ford 9" in my digger, i run 2 qts of AMSoil Severe Duty 75-90w in it. 

I do not have blow back bars on my car (7.60 SBC/Glide, 200" car), never had an issue with motor plates, etc.

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