Home Transmission Side Seals
Moderators: Cal_Gary, T. Highway, Monkey Man, robi
Transmission Side Seals
After resealing the second time I’m still getting drips. Any tips or tricks? I used the paper gaskets with oil-resistant RTV on both sides and on the bolt threads.
M37
YEAR: 1954
YEAR: 1954
Re: Transmission Side Seals
I think Charles always goes with anerobic (sp?) sealer. I think he also does some kind of internal coating due to the porous nature of the metal.
You might send him a PM.
Gary
You might send him a PM.
Gary
Cal_Gary
1954 M37 W/W
MVPA Correspondent #28500
1954 M37 W/W
MVPA Correspondent #28500
Re: Transmission Side Seals
ensure there is correct transmission breath. if ther is internal pressure then it will he expected to have leaks.
I've seen that In JD tractors front wheel drive axels.
I've seen that In JD tractors front wheel drive axels.
Re: Transmission Side Seals
Got this from Charles on the bookface, worked perfectly.
It is typical for the sheet metal covers to have pulled areas around the 6 bolt holes; a result of bolts being over tightened. With the edge of the cover on a solid surface, lightly hammer the bolt hole areas back flat. Clean the covers well, a fine wire scratch wheel on a bench grinder works great for this. Also clean the cover mounting surfaces on the case removing all traces of old gasket and adhesive from the surfaces by using a suitable scrapper. Aerosol brake cleaner and a Scotch-Brite pad works well to remove any traces of old adhesives and sealers. Wipe clean and blow dry. With that done use a cork gasket that is a minimum of 1/16" thick. It's best to get FRESH new material from someplace like McMaster - Carr Supply Co. They are online or it's easy to place an order by phone, 404-346-7000. A cork-rubber material works best. The part number is 96165K32. This cork material has buna N oil resistant rubber blended into it. Cut your new gaskets using the cover plate as a template. Hang the gasket on a suitable hanger and spray both sides with a light coating of Copper-Coat gasket sealer aerosol spray; (available at NAPA) let the gaskets hang for 15 minutes. It is a good idea to run a 3/8 course thread tap in the case bolt holes just to be sure the threads are fresh and clear of any burrs. Place the gasket carefully on each cover aligning the bolt holes. The bolts used for mounting are 3/8" X 3/4"course thread. Use 1 split lock washer and 1 SAE flat washer on each bolt. It is best to use new grade 8 bolts and washers as they do not bend and distort like the cheap hardware does. The flat washer will help distribute the bolt clamping pressure over a wider area and will help not to distort the area around the holes that you hammered flat earlier. VERY IMPORTANT next step; apply thread sealant on the bolt threads of each new bolt. We use Permatex High Temperature thread sealant, #59235. This is available at NAPA and other outlets. Follow the directions on the tube for correct application. Carefully install the cover being sure the SAE 3/8 washer is against the cover, the lock washer is next to the bolt head and on top of the flat washer. When all 6 bolts are started, tighten them finger tight., NEXT STEP IS CRITICAL; tighten the bolts a couple of rounds at a time, moving in a top and bottom - side to side sequence. The objective is to pull the cover down equally all around. When the split washers start to compress, proceed very carefully from bolt to bolt. NEXT STEP CRITICAL again, when you see the split washer is flat and see the cork material start to compress ever SO SLIGHTLY outward at the bolt holes, proceed to further tighten ONLY enough to see the same VERY SLIGHT outward protrusion at each of the 6 bolt holes. Follow the same sequence to install the 2nd cover. It is best to let the new assembly sit over night before refilling with oil. This works every time for us with no leaks. We always use synthetic 50 weight oil in all our rebuild transmissions and transfer cases. We do not have leaking issues using synthetic oil. Leaking only happens if something like a case crack or improper assembly is in play. Hope this helps.
It is typical for the sheet metal covers to have pulled areas around the 6 bolt holes; a result of bolts being over tightened. With the edge of the cover on a solid surface, lightly hammer the bolt hole areas back flat. Clean the covers well, a fine wire scratch wheel on a bench grinder works great for this. Also clean the cover mounting surfaces on the case removing all traces of old gasket and adhesive from the surfaces by using a suitable scrapper. Aerosol brake cleaner and a Scotch-Brite pad works well to remove any traces of old adhesives and sealers. Wipe clean and blow dry. With that done use a cork gasket that is a minimum of 1/16" thick. It's best to get FRESH new material from someplace like McMaster - Carr Supply Co. They are online or it's easy to place an order by phone, 404-346-7000. A cork-rubber material works best. The part number is 96165K32. This cork material has buna N oil resistant rubber blended into it. Cut your new gaskets using the cover plate as a template. Hang the gasket on a suitable hanger and spray both sides with a light coating of Copper-Coat gasket sealer aerosol spray; (available at NAPA) let the gaskets hang for 15 minutes. It is a good idea to run a 3/8 course thread tap in the case bolt holes just to be sure the threads are fresh and clear of any burrs. Place the gasket carefully on each cover aligning the bolt holes. The bolts used for mounting are 3/8" X 3/4"course thread. Use 1 split lock washer and 1 SAE flat washer on each bolt. It is best to use new grade 8 bolts and washers as they do not bend and distort like the cheap hardware does. The flat washer will help distribute the bolt clamping pressure over a wider area and will help not to distort the area around the holes that you hammered flat earlier. VERY IMPORTANT next step; apply thread sealant on the bolt threads of each new bolt. We use Permatex High Temperature thread sealant, #59235. This is available at NAPA and other outlets. Follow the directions on the tube for correct application. Carefully install the cover being sure the SAE 3/8 washer is against the cover, the lock washer is next to the bolt head and on top of the flat washer. When all 6 bolts are started, tighten them finger tight., NEXT STEP IS CRITICAL; tighten the bolts a couple of rounds at a time, moving in a top and bottom - side to side sequence. The objective is to pull the cover down equally all around. When the split washers start to compress, proceed very carefully from bolt to bolt. NEXT STEP CRITICAL again, when you see the split washer is flat and see the cork material start to compress ever SO SLIGHTLY outward at the bolt holes, proceed to further tighten ONLY enough to see the same VERY SLIGHT outward protrusion at each of the 6 bolt holes. Follow the same sequence to install the 2nd cover. It is best to let the new assembly sit over night before refilling with oil. This works every time for us with no leaks. We always use synthetic 50 weight oil in all our rebuild transmissions and transfer cases. We do not have leaking issues using synthetic oil. Leaking only happens if something like a case crack or improper assembly is in play. Hope this helps.
M37
YEAR: 1954
YEAR: 1954