auto trans question
Thread Starter
Intermediate
Joined: Jul 2014
Posts: 25
Likes: 0
From: lawrence NJ
auto trans question
I have just finished rebuilding the engine. Installed a new torque converter seal (trans input seal) and installed the engine. i have yet to hook up ALL the stuff yet. Bell housing bolts and torque converter bolts-done. When i installed the trans input seal there was a metal ring that ' clipped ' over the input seal. I forgot to install this ring. What is this ring and is it necessary ? I do not want to pull this #$%^& thing back out
thanks for any info
thanks for any info
Safety Car
Joined: Aug 2009
Posts: 3,750
Likes: 275
From: Melbourne, Victoria, Australia
I have just finished rebuilding the engine. Installed a new torque converter seal (trans input seal) and installed the engine. i have yet to hook up ALL the stuff yet. Bell housing bolts and torque converter bolts-done. When i installed the trans input seal there was a metal ring that ' clipped ' over the input seal. I forgot to install this ring. What is this ring and is it necessary ? I do not want to pull this #$%^& thing back out
thanks for any info
thanks for any info
The early C4 did not have the retainer clip over the front seal, I blew my front seal out of my 85 that does not have the retaining clip.
The trans builder modified the transmission oil pump with a pressure relief hole, never had it happen again.
The next transmission was from an 89 which had the retainer clip,
If you take it easy and don't drag race 20 runs in a row you should be ok. My 85 front seal blew on my tenth 1/4 mile run in a row doing low 13 sec quarters when it was naturally aspirated.
perhaps wait and see, if the seal was installed correctly and drive normally it should no be a problem.
Its a big pain in the *** to remove the transmission again,
however blowing the front seal means a tow truck ride home.
The retainer was obviously put there for a reason, for lead foot racers like me
Last edited by gerardvg; Oct 10, 2016 at 08:41 PM.
Thread Starter
Intermediate
Joined: Jul 2014
Posts: 25
Likes: 0
From: lawrence NJ
thanks for the info i hope that it works out also 1 more dumb question: is the fuel regulator on the feed or the return line ? took this apart awhile ago..... i am trying to figure out which line hooks to which where they connect by the front right head thanks
Safety Car
Joined: Aug 2009
Posts: 3,750
Likes: 275
From: Melbourne, Victoria, Australia
I can check in my shop manual when I get home from work.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The front pump seal retaining ring was a bandaid that is not necessary if the drainback hole is enlarged. Usually this is done as a standard procedure on any rebuild and the later 700r4s and 4L60(e)s have the larger drainback hole.
One of the reasons for the seal retaining ring is that the front bushing has a tendency to "walk" forward and push the seal out. Later 700r4s have a ridge inside the front where the bushing sits. This requires that the bushing be pressing in from the back, but it can't walk forward and push out the seal.
One of the reasons for the seal retaining ring is that the front bushing has a tendency to "walk" forward and push the seal out. Later 700r4s have a ridge inside the front where the bushing sits. This requires that the bushing be pressing in from the back, but it can't walk forward and push out the seal.
Last edited by Cliff Harris; Oct 11, 2016 at 02:12 AM.
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
In addition to the excellent advice you already received.. If you blow that seal at speed, you will lose so much fluid, so fast, it may easily cost you the 3/4 clutch. It is incredibly fragile.
When you lose pressure in a 700/4l60 it is the first thing to go.
It could create a safety issue also if the conditions were right.
When you lose pressure in a 700/4l60 it is the first thing to go.
It could create a safety issue also if the conditions were right.
Thread Starter
Intermediate
Joined: Jul 2014
Posts: 25
Likes: 0
From: lawrence NJ
to gerardvg the thread is the same for both i think the regulator is on the return side, but the pic in my Hayes manual is small and fuzzy
To all, thanks for the good info on the trans , my car is a 1990 , is this considered a later 4160 ? it had a drain hole behind the seal little smaller than the diameter of a p
en, Does this trans have that bushing that cannot walk out ? thanks
To all, thanks for the good info on the trans , my car is a 1990 , is this considered a later 4160 ? it had a drain hole behind the seal little smaller than the diameter of a p
en, Does this trans have that bushing that cannot walk out ? thanks
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
I don't have a parts book in front of me, but it is probably the 4L60.
Frankly, they're the same trans and the biggest change was better sprags in the 60. The "E" came out in 93 if I remember right and it had the step in the pump. I think the drain back is bigger, but I never actually measured it.
Although, it is worth noting that GM used the retainer on the "E" as well, and it ran in production right to the end.
I do not recall a step on any of the hydraulic units, and even the "step" isn't much to begin with. You can drive the bushing right past it if you aren't careful. That is how small it is.
Frankly, they're the same trans and the biggest change was better sprags in the 60. The "E" came out in 93 if I remember right and it had the step in the pump. I think the drain back is bigger, but I never actually measured it.
Although, it is worth noting that GM used the retainer on the "E" as well, and it ran in production right to the end.
I do not recall a step on any of the hydraulic units, and even the "step" isn't much to begin with. You can drive the bushing right past it if you aren't careful. That is how small it is.
Last edited by confab; Oct 11, 2016 at 06:56 PM.
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Safety Car
Joined: Aug 2009
Posts: 3,750
Likes: 275
From: Melbourne, Victoria, Australia
[QUOTE=rather b driving;1593234139]to gerardvg the thread is the same for both i think the regulator is on the return side, but the pic in my Hayes manual is small and fuzzy
Hi
Had a look at my 85 on the weekend the smaller diameter fuel pipes of the two is to the left and the larger to the right, the fuel rail has one smaller diameter tube and one larger.
They match up so doesn't require much thought,
Cheers
Gerard
Hi
Had a look at my 85 on the weekend the smaller diameter fuel pipes of the two is to the left and the larger to the right, the fuel rail has one smaller diameter tube and one larger.
They match up so doesn't require much thought,
Cheers
Gerard
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
I have just finished rebuilding the engine. Installed a new torque converter seal (trans input seal) and installed the engine. i have yet to hook up ALL the stuff yet. Bell housing bolts and torque converter bolts-done. When i installed the trans input seal there was a metal ring that ' clipped ' over the input seal. I forgot to install this ring. What is this ring and is it necessary ? I do not want to pull this #$%^& thing back out
thanks for any info
thanks for any info