MustangWorks.com - The Ford Mustang Power Source!

Go Back   MustangWorks.com : Ford Forums > Mustang & Ford Tech > Windsor Power
Register FAQ Members List Calendar Mark Forums Read

Reply
 
LinkBack Thread Tools Rate Thread Display Modes
Old 06-26-2008, 11:15 PM   #1 (permalink)
Stang_ROTY
Registered Member
 
Stang_ROTY's Avatar
 
Join Date: Feb 2001
Location: Berkshire County - Massachusetts
Posts: 735
Default 351 C4 guys...question on front main seal lifespan

--------------------------------------------------------------------------------

THe other day I had the pleasure of losing a front main seal on my C4 MIghtMite tranny from Dynamic Racing while shifting hard from 2nd to 3rd. Big smoke show

I have about 2000 miles total on the combination over 3 years and about 35 passes at the strip. Been a VERY reliable setup. I'll be yanking the motor ASAP to replace seal. Cause for concern or typical wear?
__________________
Red 1993 GT Street Machine
Best E.T. - 12.41/Best MPH = 108
Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more
Stang_ROTY is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 06-28-2008, 09:22 PM   #2 (permalink)
goodyear1984
Registered Member
 
Join Date: Dec 2006
Location: new york
Posts: 482
Default Re: 351 C4 guys...question on front main seal lifespan

make sure there is no play in the shafts..also make sure the pump is not whats leaking
__________________
347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
goodyear1984 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 06-30-2008, 06:34 AM   #3 (permalink)
Stang_ROTY
Registered Member
 
Stang_ROTY's Avatar
 
Join Date: Feb 2001
Location: Berkshire County - Massachusetts
Posts: 735
Default Re: 351 C4 guys...question on front main seal lifespan

By that you mean the input shaft? Is there any way to tell if the pump is the cause without pulling everything? I put about 2 gallons into it and about 5 seconds after I started it up it came pouring out the bottom of the bellhousing

Quote:
Originally Posted by goodyear1984 View Post
make sure there is no play in the shafts..also make sure the pump is not whats leaking
__________________
Red 1993 GT Street Machine
Best E.T. - 12.41/Best MPH = 108
Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more

Last edited by Stang_ROTY; 06-30-2008 at 09:07 AM..
Stang_ROTY is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 06-30-2008, 06:21 PM   #4 (permalink)
goodyear1984
Registered Member
 
Join Date: Dec 2006
Location: new york
Posts: 482
Default Re: 351 C4 guys...question on front main seal lifespan

u really have to pull it out and inspect it what ever it is should stick out.
__________________
347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
goodyear1984 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 06-30-2008, 06:24 PM   #5 (permalink)
goodyear1984
Registered Member
 
Join Date: Dec 2006
Location: new york
Posts: 482
Default Re: 351 C4 guys...question on front main seal lifespan

you could do a pressure test but with it leaking like that it would be point less ,,,plus u dont want to run it low on fluid and have to replace the clutches and bands
__________________
347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
goodyear1984 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-01-2008, 09:34 AM   #6 (permalink)
Stang_ROTY
Registered Member
 
Stang_ROTY's Avatar
 
Join Date: Feb 2001
Location: Berkshire County - Massachusetts
Posts: 735
Default Re: 351 C4 guys...question on front main seal lifespan

Yeah that's a good point about running low on fluid. I lost all 3 gears when trying to get her home during the massive leak. Ended up about a 1/4 mile away when I lost all my gears. Tranny was bone dry. I'm running a temp gauge and didn't notice any increase in temp so hopefully it's ok internally. I'm going to bring it back down to Harold at Dynamic Racing to have them look at it. I went with the automatic setup over a 6 speed b/c I figured it'd be more reliable. But maybe the 2500-3000 rpm traveling on the highway to the track hurt it? I can't imagine 30-40 12 second passes on a tranny that's made for 8 second Stangs did any abnormal wear.

This wasn't a cheap tranny at all...I'm a bit surprised (and disappointed) that seals are going this soon.

Quote:
Originally Posted by goodyear1984 View Post
you could do a pressure test but with it leaking like that it would be point less ,,,plus u dont want to run it low on fluid and have to replace the clutches and bands
__________________
Red 1993 GT Street Machine
Best E.T. - 12.41/Best MPH = 108
Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more
Stang_ROTY is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-16-2008, 06:53 PM   #7 (permalink)
theracinjason
Registered Member
 
Join Date: Mar 2005
Posts: 9
Default Re: 351 C4 guys...question on front main seal lifespan

Sounds like a pump gasket to me. this is notorious if you have a small bellhousing. this means the bellhousing bolts also hold the pump. if you bought it and had it shipped with no bellhousing im sure there were 2 bolts holding the pump in place. because in a c4 it has to be standing on its tail to install the pump. if you take the pump or bellhousing bolts out (all 7of them) it is absolutely imperative the trans is standing on its tailshaft. you will need a buddy or a special table or a post in the garage with a ratchet strap. what i have done in the past isstand up the trans, remove the 2 countersunk bolts, if your trans builder used them. then bolt on the bellhousing using all 7 bolts instead of just 5 left if there are countersunk bolts from the builder/shipper. if you choose not to do this, make certain you torque in sequence and go a little more than Ford's reccomended 28lbs. i like 35 and have not had a recurrance since.
theracinjason is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-07-2010, 09:00 PM   #8 (permalink)
FastSmitty
Registered Member
 
Join Date: Oct 2010
Posts: 1
Default Re: 351 C4 guys...question on front main seal lifespan

I was wondering anything if you found out what the problem is? On my new Art carr tranny.... same issue.... Wow when everyone said pump i thought it would be something easy to get to but looks like i will have to drop the tranny.... so I guess it is the main seal or the pump.... so yea fun stuff.....
FastSmitty is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Sponsored Links
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Similar Threads
Thread Thread Starter Forum Replies Last Post
main seal.. 89GTimporteater Windsor Power 5 11-26-2003 12:50 PM
rear main seal racerx0071 Windsor Power 1 02-19-2003 01:18 AM
Rear Main Seal 1hot5.0 Windsor Power 9 09-10-2002 06:22 PM
Rear main seal RPM427 Windsor Power 6 06-24-2002 11:42 AM
Rear main seal on 87 2.3L Radon Small Ponies 1 02-20-2001 02:08 PM


All times are GMT -5. The time now is 05:07 AM.


SEARCH