• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

TR6 TR6 Differential Followup, and inspection questions. How do you know it's good?

Bob_TR6

Senior Member
Country flag
Offline
Hey all:

Back with more qs. Dropped the exhaust, removed the differential. Tried rotating the output shafts as well as the input--felt kinda 'notchy', like there were gears in there or something ;)

Pulled the r and l output shafts and bearings--bearings felt good, spun nice, no funny spots.

Put them back in the casing, pulled the back of the casing off and took a peak inside: If you hold the input and one of the outputs, and try to spin the other, there's what seems to be a lot of play in the planet (?) gears--you can wiggle it quite a bit. How much is too much? I mean, there's enough slop that you can 'click' the gears while you wiggle them. This is the 'gear lash' right?

Also, those gears (except the crown and pinion) all seem to have a notch in them about 1/2 way up the tooth: Normal? Looks machined.
(EDIT TO ADD: pix on the internet imply it's normal)

And, FWIW, the oil looked like mud when I drained it--didn't see anything shiny though.

So: Is there an inspection procedure for a differential that I can perform? Or do I just get the rest of the oil out of it and send it off to be rebuilt$$$?

Edit to add: any reason that a local transmission shop *couldn't* rebuild it?
 
Last edited:

TR3driver

Great Pumpkin - R.I.P
Offline
A small amount of play is normal, enough to cause a 'click'. But that "notchy" feeling is cause for concern; it should turn perfectly smoothly as long as you keep going in the same direction. Unfortunately, the bearing most likely to fail is also the hardest to get to. This is what I found in my newly purchased "rebuilt" Stag diff:


So I'd say send it off (if you can't do it yourself).

There's nothing particularly magical about the TR6 diff IMO, but based on a recent experience with having a Buick differential rebuilt; I'd say it's worth the extra hassle and expense to ship it to someone you trust. The first rebuild went sour in less than 1000 miles, and the things my local (trusted) shop found showed clearly that the first shop had no clue (and apparently had a gorilla on staff).
 
OP
B

Bob_TR6

Senior Member
Country flag
Offline
Update:

Pulled the diff, local shop said they'd look at it--supposed to go in tomorrow. Figured I'd take one last look at all the bits and pieces before then. Took checked the drive shaft ujoints for play--again. (The way I normally check for play is to grab either side and twist in opposite directions). Felt tight. Really tight.

Lay down the one end of the drive shaft, noticed that the ujoint didn't move/pivot. At all.

U joint seized. Guess I haven't seen that before.

Cancelled appt for diff rebuild, off to napa for u-joints.

Thanks again, guys.
 
Similar threads
Thread starter Title Forum Replies Date
Ripper01 Sold- TR6 Differential drive Triumph Classifieds 1
Ripper01 For Sale TR6 Differential Triumph Classifieds 0
J TR6 TR6 Differential Rebuild question Triumph 6
L Wanted Tr6 differential Triumph Classifieds 9
B TR6 TR6 Differential bearings. Triumph 3
T TR6 TR6 Differential Ratios Triumph 8
B TR6 1972 TR6 Differential Rebuild Question Triumph 3
SkinnedKnuckles TR6 TR6 Differential Rebuild Triumph 4
glemon TR6 tr6 differential seal Triumph 10
W TR6 TR6 Differential Question. Triumph 6
MTribe TR6 TR6 differential leak fix - what to do? Triumph 11
mgedit TR6 TR6 Differential Mounts Triumph 6
K TR6 tr6 differential - need feedback! Triumph 16
J TR6 Last TR6 differential question Triumph 16
R TR6 TR6 differential internal upgrade Triumph 0
H TR6 Tr6 differential backlash Triumph 2
Aeroken TR6 TR6 Differential Inner Shaft Seals Triumph 8
T TR6 What year TR6 did NOT have a differential oil drai Triumph 11
C TR6 TR6 Differential Oil Seal ? Triumph 0
tr6web TR6 DIfferential and support damage TR6 Triumph 20
BwanaJoe TR6 TR6 radiators Triumph 1
E TR6 ā€˜74 TR6 Starter & Trans Cover Triumph 13
M TR6 Fuse box wiring mystery Triumph 9
M TR6 Windshield Trim TR6 Triumph 14
J TR6 72 TR6 starter problem Triumph 10
nichola TR6 Procar Pro-90 Seats in the TR6 Triumph 0
E TR6 TR6 top dash trim paint Triumph 2
S TR6 Should I Buy This "73 Triumph TR6" Triumph 3
J TR6 1975 TR6 Alternator Advance/Retard spring(s) Triumph 1
F For Sale Wheel Trim Rings Triumph TR6, $95.00 Triumph Classifieds 0
P TR6 TR6 Frame Stiffener Triumph 4
Geo Hahn TR6 TR6 Oil Line Thread Size Triumph 1
C TR4/4A Advice for grafting TR6 frame front to TR4A frame rear Triumph 14
C TR6 Latest TR6 updates and pics Triumph 10
P TR6 TR6 Horn Relay Problems Triumph 8
tr6nitjulius General TR TR6 Triumph 0
Sherlock Triumph TR6 (rather modified) Spotted 2
D TRIUMPH TR6 BODY SHELL Triumph Classifieds 0
M For sale rear wings Tr6 Triumph Classifieds 3
tr6nitjulius TR6 Ongoing Love Affair with 1 TR6 Triumph 8
J TR6 73 TR6 Temp Gauge Wiring Question Triumph 6
M Have a pair of tr6 rear wings Triumph Classifieds 0
Ripper01 For Sale- TR6 Wiring Harness Triumph Classifieds 0
B TR6 TR6 1976 Clutch Choice Question Triumph 3
Gliderman8 TR6 Spark plugs for TR6 Triumph 7
tr6nitjulius TR6 TR6 meeting my Demands & Giving Back more! Triumph 2
tr6nitjulius TR6 TR6 Triumph 0
M Wanted TR6 Rear Bumper impact Brackets Triumph Classifieds 0
C TR6 TR6 TURN SIGNAL PROBLEM Triumph 13
Kdub Wanted TR6 Mechanic Triumph Classifieds 2

Similar threads

Top