GM Gaskets

[luvrbus]

Where do guys buy the gaskets to go between engine,spacer and transmission on a 4905

thanks

[brando4905]

Clifford,

Had my trans. re-sealed at Luke's a couple of years ago on our 4905 (v730), and he had the gaskets at that time.

Brandon

[tuccitown]

Any Detroit/Allison dealer will have them, I bough mine at W. W. Williams.

Jack

[Geoff]

You don't 'have' to have gaskets.  I've sealed my Allison to the engine just using silicone.  Just make sure you use Brake Clean and wipe the surfaces super clean before putting on the silicone.

[eagle19952]

i hate silicone, most people use way to much and irt ends up clogging suction side screens and filters, it breaks down when exposed to oil..it looses its adherance.
but you know that.

[gus]

Actually, many OEM applications call for silicone sealer for gasket material, Chrysler uses a lot of it and one application is for engine to trans.

[eagle19952]

Actually, many OEM applications call for silicone sealer for gasket material, Chrysler uses a lot of it and one application is for engine to trans.

and that maybe but I will not use it.I will get a ballpeen hammer and a piece of gasket paper and make one.
OR find a suitable altrenative like Gore-tex tape and an anerobic sealant or just the sealant,or Caterpillar red gasket replacer.
To each his own.Chrysler does what they want and I know better what works for me.
http://www.lehighgasket.com/goretape.html
I have ran/owned alot/afew (of) shops and as I said I have seen the damage done by silicone..
PS Why would you seal a bell housing to an automotive engine....has something changed since the 50's/60's  

[gus]

This bell housing contains a torque converter.

[eagle19952]

This bell housing contains a torque converter.

look i am not trying to squabble,
but a few million automotive bell housings came with a plastic inspection portion, a hole for drainage, or an inspection plate, all of which got broken, or fell off....most torque convertors are dry sump. no leak.
I still hate silicone, except as an adhesive, and NOT a gasket cement.
To each his own.

[Just Dallas]

I agree with you. RTV silicone does not seal anything, it makes a buffer.
The newer standard transmission GMC's used a wet clutch and the housing was filled with oil. I would use a real gasket there, silicone will never ever seal under those circumstances.
Detroit/Allison can get them, MCI can get them, Muncie Transit can get then, The place in California, (HCB?) can get them Busfixx.com can get them, and Mohawk can also get them.

You makes your choice, you takes your chance....but I would order from Luke on this one.

Good Luck.

DF

This bell housing contains a torque converter.

look i am not trying to squabble,
but a few million automotive bell housings came with a plastic inspection portion, a hole for drainage, or an inspection plate, all of which got broken, or fell off....most torque convertors are dry sump. no leak.
I still hate silicone, except as an adhesive, and NOT a gasket cement.
To each his own.

[luvrbus]

Thanks Dallas old school here as you know that is why I said where do I buy the GASKET hell I know where to buy RTV lol


good luck

[Geoff]

When I rebuilt my engine and put it back in the bus I had to make a 35 mile drive (one way) to the nearest Detroit/Allison dealer to buy the transmission to flywheel housing gasket.  The parts guy looked it up and gave me a $15 gasket that looked about the right size.  I drove back 35 miles only to discover that what the parts guy gave me was not the gasket I wanted, but the torque converter gasket.  Boy was I pissed.  So I cleaned up the surfaces with Brake Clean and used black silicone to mate the engine and transmission together (it is a wet flywheel) and now it's thirteen years later and 60,000 miles and it doesn't leak.  Silicone used properly works wonders.

--Geoff
General Diesel Service
Prrescott, AZ

[eagle19952]

Silicone used properly works wonders.
And there in lies the problem, most do not.
Silicone will not cure in the presence of oil or water.
If the RTV squeezes in to the oil side of the seal it will be mush and will then migrate to the "sealed" mating surface and deteriorate that seal, it will "work" if it is allowed to TOTALLY cure before it is exposed to that which it is supposed to seal.It is like using Gummy Worms for gaskets.Silicone takes way to long to cure,the avg. shop will in and out the job in under flat rate and this is not adequate curing time.IMO
I have seen it a thousand times.
One of the most expensive places I have found it was in the suction screen of the lube pump of a differential in a Mack truck.
I would have driven the 35 miles. But everyone has there own way.
I just like GASKETS better  
Hylomar or Permatex are my favorites.
Hylomar® is manufactured under licence from Rolls-Royce plc by Hylomar Ltd
® Registered trade mark of Hylomar Ltd

http://www.hylomar.com/index.php?option=com_docman&task=cat_view&gid=54&Itemid=75
http://www.permatex.com/documents/tds/Automotive/85249.pdf
http://www.permatex.com/documents/tds/Automotive/51031.pdf
http://www.permatex.com/documents/tds/Automotive/80057.pdf
http://www.permatex.com/products/Automotive/automotive_gasketing/gasket_sealants/auto_Permatex_1372_High_Temperature_Form-A-Gasket_Sealant.htm