Need product suggestion - tranny case assembly sealant

blamkin86

blamkin86

Well-known member
I'm in need of a good product suggestion.

I have a quaife dog box - and I'm extremely unhappy with the factory case gaskets... they leak very quickly no matter what I try.

I've had the dogs and gears machined, and am putting the case back together this weekend. There's no chance I'm putting those dumb (cork) gaskets back in there.

I tried the "great stuff" sealant last time, with mixed success...I'm planning on using the Mazda goop, which they put on the oil pan instead of gaskets, which seems to work very well for that application.

What goop/sealant/RTV are you folks using for this type of job?

As I have a couple days, I thought I'd see what other people liked.

Thanks in advance,
--Bill
 
Yamabond....... You can get at local Yamaha dealer. As long as there not using the gasket/seal for spacing just use this stuff. On our 914 901 gearbox we always had a small leak issue at the tail cover. Used Yama and was never a issue again.
 
Forgot about that yamabond stuff - I think I'll give that a try; if it doesn't work I'll be a leaky drippy prod car... so no one should notice.

Thanks guys.
 
Hammill":1ixvlhxy said:
Yamabond....... You can get at local Yamaha dealer. As long as there not using the gasket/seal for spacing just use this stuff. On our 914 901 gearbox we always had a small leak issue at the tail cover. Used Yama and was never a issue again.
Click to expand...

+1.

In tough sealing situations (like the split case in my Toyota T50 gearbox), I use stuff called Threebond 1211. It's very similar to Yamabond 4.

-Kyle
 
I believe HondaBond is the same stuff as the Yamaha product. My Honda racer buddy says it is pretty incredible.
 
YamaBond #4 (racing) it is. $27 shipped for two tubes... cheaper than the mazda stuff, which I was out of anyway.

Thanks again everybody.
 
How easy is the tranny with Yamabond to dis-assemble?

I use the gray RTV with good success on Jay's old Spridget Webster box, but it's hard to dis-assemble. That stuff really sticks!

John
 
This is what I have learned to use when a thin paper type gasket is used or then is really no gasket. My uncle used it to seal the case halves when he was doing VW air cooled stuff. You paint it on both surfaces and let it tack up a little.

http://www.permatex.com/products/automo ... lant_a.htm

Warning: don't get it on your hand or clothing and let it dry. It does not come off for a while.

Also don't buy are really big bottle because it can dry out over time. I think I have the 4 oz bottle at home and it lasts for a lot time.
 
Locktite 5900, this is what most major automotive companys use to seal the rear diff covers, engine front cover, oil pans, etc. and i believe the Yamabond is the same product just branded for Yamaha.

Ted
 
Bill,

You must understand the heritage of this box to understand why it`s leaking. First and foremost many of the threaded holes are not `blind` but rather `drilled thru` and simply tapped. The Brits never could understand why their products leaked. The Quafe is no exception. Having serviced these boxes for many years I can assure you that there are many fastening sites that are prime for leaks. Everyone has their `secret sauce` in which to seal things and to that list I will add Permatex Ultra Copper . The gaskets are typical- horrible British quality. I try to NOT use them, going with clean dry surfaces and using the Ultra Copper. I also plug the breather on top of the Rocket 4 box and build one into the tail housing. The worst offender of the Quafe product line for leaks is the Rocket 4.


Jeff Winter
Rallye/Sport - Winter Racing Engines
Westminster, Colo 303 427 0510
 
You must log in or register to reply here.
Back
Top