77 XJ12L transmission mount
#1
77 XJ12L transmission mount
22k mile garage queen and I am cleaning out some of the minor bugs for a pal. A thunking noise on anything but smooth roads and similar to bad sway bar links but a little manlier in sound. Also, no staccato action like bad links going over rough road.
I'll skip the learning curve adventures but find the bushing in the spring loaded transmission mount has disintegrated while changing the trans fluid and filter.
This has got to be a potential source of a thunking noise. However, if not, it still needs tending to.
My questions:
Should I replace the spring along with the bushing? Is is mandatory on a cream puff given the limited cycles experienced by the spring?
Is the tongue that bolts to the transmission pan under the mount saddle for added stiffness to offset the 12 cyl torque? Does it exist on 6 cyl models? It's quite a sophisticated arrangement.
Is this picture the mount bushing?
I'll skip the learning curve adventures but find the bushing in the spring loaded transmission mount has disintegrated while changing the trans fluid and filter.
This has got to be a potential source of a thunking noise. However, if not, it still needs tending to.
My questions:
Should I replace the spring along with the bushing? Is is mandatory on a cream puff given the limited cycles experienced by the spring?
Is the tongue that bolts to the transmission pan under the mount saddle for added stiffness to offset the 12 cyl torque? Does it exist on 6 cyl models? It's quite a sophisticated arrangement.
Is this picture the mount bushing?
#2
#3
The following users liked this post:
Bob Kontak (08-19-2013)
#5
#6
The spring works both ways in compression and tension as the Trans moves up and down. They rarely need replacing. The bush is actually a bump stop. You should also replace the rubber cups on each end of the spring. This is usually where the noise comes from. Johns Cars sell a polyurethane replacement for the rubber bush and spring seat isolators which is not so prone to deterioration when exposed to oil and Trans fluid.
The following users liked this post:
Ahabiam (08-21-2013)
#7
I have only one cup (I thought I was ordering two) so I will call John's Car's in Dallas tomorrow and order both.
Below is a picture of the old bushing and a picture of all the parts save the second cup.
Thread
Thread Starter
Forum
Replies
Last Post
FS[SouthEast]: X300 XJR engine & misc parts
knightofgold
PRIVATE For Sale / Trade or Buy Classifieds
11
02-11-2016 06:03 PM
FS[SouthWest]: Red 2001 XK8 Convertible in Colorado
picard
PRIVATE For Sale / Trade or Buy Classifieds
7
10-12-2015 11:56 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)