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Author
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Topic: Flywheel Relation Between 1pc and 2pc Rear Main Seals
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68 S-code GT
Gearhead Posts: 3835
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-08-2005 10:27 AM
 
Looking at flywheels and I think there is a difference regarding the type of rear main seal is on the engine. I will be working on a 1995 351W soon and need to find out if the flywheel would be different than that of the pre 1994 engines with the 2 piece rear main seal. I think there is a difference with the 302 and the 5.0HO with this besides the balancing. I have to get a wheel to use on a 71 302 engine and was hoping to only have to buy one but if not then I��ll have to get another for the 351W later.------------------
Ed S. 68 S-code FB GT 4spd(now C6)/3.25 PS PDB
68 J-code(now 289) Cp Sprint"B" C4/3L00-9" PDB PS AC Bla-Bla-Bla
99 F150 XLT Ext/cab, 4X4, 5.4L, 3L55
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mizry
Journeyman Posts: 97
From: ca
Registered: Sep 2004
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posted 06-09-2005 12:46 AM
sometime in the mid eighty's the flywheels got an offset. that is why the newer 5.0's use the same sarter between the manual and auto trans. the early flywheel has no offset and requires its own starter. the flywheel, clutch, bellhousing and starter should all match as a combo, dont think the engine type is gonna matter.
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68 S-code GT
Gearhead Posts: 3835
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-09-2005 08:35 AM
It��s just that I��ve seen some noted as being for a 1 piece rear seal. The 1995 351W I have has a 1 piece seal. I don't have the auto flex-plate to even compair it to earler ones I have.------------------
Ed S. 68 S-code FB GT 4spd(now C6)/3.25 PS PDB
68 J-code(now 289) Cp Sprint"B" C4/3L00-9" PDB PS AC Bla-Bla-Bla
99 F150 XLT Ext/cab, 4X4, 5.4L, 3L55
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68 S-code GT
Gearhead Posts: 3835
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-10-2005 02:02 PM
No more comments from the peanut gallery? 
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Rustang
Gearhead Posts: 880
From: Clarion PA
Registered: Nov 2000
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posted 06-11-2005 05:22 PM
quote:
Originally posted by mizry:
sometime in the mid eighty's the flywheels got an offset. that is why the newer 5.0's use the same sarter between the manual and auto trans. the early flywheel has no offset and requires its own starter. the flywheel, clutch, bellhousing and starter should all match as a combo, dont think the engine type is gonna matter.
I wonder if this is the problem I've been chasing with my thrust bearing problem in my motor? The rear thrust surface has worn out on two sets of bearings now. I haven't got a chance to really dive closely into it, but I have enough torque converter endplay that you can shove the torque converter clear behind the flex plate when the trans is bolted up to the engine  I'm running a 347 crank with 1 piece seal, roller block, and older flex plate and bell. I did pull the torque converter out of the trans this morning and I notice some wear marks next to the pump tangs. I suspect there's enough endplay that maybe the torque converter could be jamming up against the pump? I'll do some measuring tonight and let you know what I've found.
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'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??
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mizry
Journeyman Posts: 97
From: ca
Registered: Sep 2004
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posted 06-11-2005 10:41 PM
quote:
Originally posted by Rustang:
I wonder if this is the problem I've been chasing with my thrust bearing problem in my motor? The rear thrust surface has worn out on two sets of bearings now. I haven't got a chance to really dive closely into it, but I have enough torque converter endplay that you can shove the torque converter clear behind the flex plate when the trans is bolted up to the engine I'm running a 347 crank with 1 piece seal, roller block, and older flex plate and bell. I did pull the torque converter out of the trans this morning and I notice some wear marks next to the pump tangs. I suspect there's enough endplay that maybe the torque converter could be jamming up against the pump? I'll do some measuring tonight and let you know what I've found.
sounds like a ballooning converter problem. the auto flex plates seem to have the same offset since day one of the 289/302 unlike the manual trans flywheels which have changed.
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68 S-code GT
Gearhead Posts: 3835
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-12-2005 09:11 AM
So this off set will only affect the starter or will it also affect the clutch setup? I'm pretty sure that all of the 351Ws are 28oz.
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68 S-code GT
Gearhead Posts: 3835
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-20-2005 08:55 AM
Summit says,On the 351W, the balance stayed the same, and it doesn't matter whether it's a one, or two piece seal. From Ford Racing site, Since Ford uses the M-6375-A302 wheel on their M-6007-A392/D392 engines I guess it doesn��t matter. The M-6375-A302 Flywheel is a 28.2 oz. Unbalance that fits Pre-1981 302 engines and 351 engines using 157T flywheels. The engine block is a F4TE block, which was in the 94-96 F-series pick-up trucks.
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