• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Would like to install new tailshaft bushing and rear trans seal.  I don't have the proper tools to install with tailpiece in vehicle, may not have the room either.  May be easier to remove the tailpiece and install these new parts.  How would I do this ?  I know how to remove the drive shaft but am not sure about supporting the trans and exactly what parts I have to remove to get the tail piece out.  Four bolts to actually remove the tail piece, but the tail piece is also attached to the trans mount.  Any pointers/advice would be apprecitated. I also swapped wheels/tires back to front and vice versa, made no difference in the vibration. I did check the yoke where it enters into the tail piece and there is distinct play in this area, thinking the tailshaft bushing is worn out.  Thanks [Image: IMG-2110.jpg]

[Image: IMG-2109.jpg]

russian image hosting site
How is the transmission mount? It looks to me like there are pieces of rubber hanging out of it.

You will have to support the transmission, and raise it slightly to get the mount and cross member off. A jack and a piece of 2x4 long enough to span the pan, at the rear of the pan, should work. Have a pan ready to catch the fluid when the tailshaft housing is loosened. You'll need a new gasket, or make one. You'll need a torque wrench to torque the bolts to 25-30 ft.lbs.

Detailed instructions are in the Shop Manual, chapter 17-10, section 4.

“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
Sounds good, can the tail shaft be removed and the new one installed without any special tools ? Can I drive the old one out with a socket or similar and carefully reinstall the new one with a socket or similar and block of wood and hammer ? A bushing driver can be expensive and hard to find. Already checked with the auto part stores in my area and they do not loan that type of tool. Thanks
Ford dealers had tools that would do the job on the car. The remover went around the output shaft and grabbed the front of the bushing from the inside, so they didn't have to disassemble the transmission. Unless you have that specific tool (T57P-7697-A) you'll need to remove the extension housing and do the R&R on the bench.

I highly recommend you purchase a seal and bushing driver kit. It will help save you from damaging the new parts when installing them.


You could also use a punch to drive the old bushing out and a block of wood or a socket to get the new bushing and seal in place.

You could take the extension housing to any transmission shop and they'd probably do the job for you for a dozen donuts plus parts.

Great info and advice .... thanks

I was down at my local NAPA store to day. They had pressed on a couple of bearings for me that I had purchased from them for free. I asked them about the tail shaft bushing and seal and they said they would press out the old and put in the new for free if the parts were purchased from them. You might want to check them out in your area and see if they offer the same.


"The only dumb question is the one not asked"
[+] 1 user Likes Kilgon's post
More follow up .... is there a definitive test/way to tell if rear transmission mount needs to be replaced ? Was told this was something to check on ref. the problem in this thread, but it looks ok and there is no movement or looseness in the mount. Don't know if it is original or not. Thanks

(10-13-2019, 04:44 PM)naa10104 Wrote: More follow up .... is there a definitive test/way to tell if rear transmission mount needs to be replaced ?  Was told this was something to check on ref. the problem in this thread, but it looks ok and there is no movement or looseness in the mount.  Don't know if it is original or not.  Thanks

That's a fairly easy test (once the car is high enough to see/access)
using a jack or whatever support a bit the rear of the trans.
The trans mount is hold by 2 long bolts with a nut on each side of the frame. So if the mount itself is loose, the rubber too soft you'd feel it.
The insulation. The rubber between the trans and this mount is fixed by two large bolts. Itself has 2 other bolts going on each side of the trans.
Inspection is easy, remove the two large bolts in the middle. Just turn loose a bit the side of the mount with 2 holes. remove the other side (single hole, long axle)
The mount will pivot down and you have access to the rubber part. if damaged/missformed you'll know right away, if not, check if the 2 bolts on each side are there and tight. Make sure the rear of the trans is secure and supported at same height the whole time. To reinstall/eventually replace is the same easy procedure. 

I have just re-plated these rusty dirty parts, you can see them in details in my thread, last and previous post if that helps.

73 modified Grandé 351C. Almost done. 
71 429CJ. In progress
Tranny mount is $3 at Rock Auto, $13 at Advance. Since you have to remove the tailhousing to do the bushing - replace it.



[+] 1 user Likes Hemikiller's post

After more research and actually looking at the tailshaft and attempting to move the driveshaft around I do not believe I need a new tailshaft bushing. One transmission mechanic actually checked for play in the tailshaft bushing and said it was fine. When I try to make the the yoke move within the bushing I feel a slight click or movement so small almost not worth mentioning. Less than 1 mm. I also pulled the driveshaft yesterday to check the u-joints and found no signs of scoring, discoloring or wear on the yoke where it passes through the bushing. The rear u-joint was replaced less than 3k ago and the front feels fine. No play or looseness and no binding. The two caps I could easily pull off of the u-joints looked fine. All needle bearings in place. The grease within these was black and old in appearance. I was thinking that it might be a good idea to lube both u-joints with a very good quality grease before I install the driveshaft. I understand that you should actually pump each full until all the old grease is pushed out of the caps. Does that sound accurate ? The rear trans mount looks fine as far as I can tell and does not seem loose. I will loosen it today so I can see the condition of the rubber bumper in case that is worn. Any other advice woudl be appreciated. Thanks
Share Thread:  

Possibly Related Threads…
Thread Author Replies Views Last Post
  pulsing vibration libram 11 834 11-07-2018, 10:15 AM
Last Post: mbrew2
  Engine vibration sdstang 6 1,035 04-24-2017, 03:10 PM
Last Post: Don C
  351C Engine Vibration > 2500 RPM The General 36 9,430 10-21-2016, 06:44 PM
Last Post: The General
  Engine Vibration digithead 27 3,444 03-01-2016, 10:05 AM
Last Post: rocket366
  engine vibration sdstang 5 1,168 09-07-2015, 11:28 PM
Last Post: Don C

Users browsing this thread: 1 Guest(s)