• 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

Wedge Tr7/8 rear end ID RKC0100

TR3driver

Great Pumpkin - R.I.P
Offline
I don't know, but I'm guessing that it is like the earlier TRs. No matter what the case says, there are other gear sets that will fit and no guarantee that some previous owner hasn't change them. I sure didn't bother marking the case when I changed one of the Stags from 3.7 to 3.45.

So, jack it up and find out. Or, if you have access to a GPS and a working tachometer, work it out from that.
 

justin_mercier

Jedi Warrior
Offline
stamped into the bottom of the differential (not cast in) should be an identifier CL = 3.45 CK = 3.08 CT = 3.27 CH = 3.9

That said, if someone changed the pinion and crown wheel, all bets are off and you'll have to figure it out on your own.
 

tr8todd

Jedi Knight
Offline
That's the part number for the housing. To find the ratio, you have to wire brush the underside of it until you see the numbers Justin listed stamped into the metal. You can also tell by the color of the nut holding the flange on. White, yellow, blue on the 5 speed rear ends, but off the top of my head, I can't tell you which color is which ratio. Basically if it came from an 8 its 3.08, if it came from a TR7 coupe, its a 3.90 and if it came from a vert, its a 3.45. Spin the input until one of the brake drums spins one complete revolution and count how many times the input spins. Thats you ratio.
 
Similar threads
Thread starter Title Forum Replies Date
D Wedge TR7 High Speed Rear End Triumph 6
T Wedge TR7/8 3.08 rear end Triumph 0
KLUTZ Wedge TR7 Rear end wobble? Triumph 8
tr7andtvr Wedge Tr7, Tr8 or SD1 3.08 rear needed.... Triumph 25
Got_All_4 Wedge TR7 rear brake questions Triumph 9
B Wedge Help 1976 TR7 Rear Brakes!!! Triumph 11
mgbmedic Wedge TR7 Rear Brake Shoes Triumph 7
D Wedge Rear Disc Brakes for TR7 Triumph 16
T Wedge TR7 Rear Brakes Triumph 5
philman Wedge Tr7 popping sound from Rear Triumph 0
philman Wedge rear disk for a tr7 Triumph 0
D Wedge TR7 rear spoiler/wing Triumph 2
johnrip Wedge tr7 tires Triumph 1
T Wedge Canadian TR7 catalytic converter when new? Triumph 0
Got_All_4 Wedge An issue with trying to start my TR7 Triumph 9
Obtong WANTED: TR7 (Olympia/Seattle Area) Triumph Classifieds 0
T Wedge TR7 brake hard and flex lines - fittings Triumph 12
T Wedge TR7 4 speed wheel cylinders on 5 speed (locating pin) Triumph 0
Sherlock 1982 Ford F150 stepside vs 1975 Triumph TR7 Other Cars 4
humanoid For Sale - Haynes Trimumph TR7 (1975-1981) Automotive Repair Manual Triumph Classifieds 0
humanoid For Sale - Haynes Triumph TR7 (1975-1979) Owners Workshop Manual Triumph Classifieds 0
johnrip Wedge Tires for TR7 stock alloy wheels Triumph 1
johnrip Wedge TR7 LED Tail lights from Wedge Shop Triumph 1
T Wedge TR7 engine, need help identifying part. Triumph 5
S Wedge tr7/8 quick release steering wheel Triumph 0
S Wedge TR7 fuse panel Triumph 8
Got_All_4 Wedge 1980 TR7 FI linkage Problem Triumph 2
johnrip Wedge TR7 led light conversion question Triumph 1
S TR2/3/3A Tr7 and a little extra Triumph 2
P Wedge Florida TR7 Triumph 0
S For Sale Weber Conversion Kit for TR7 Triumph Classifieds 0
1 Wedge Which Parts to get from an '80/81 TR7? Triumph 1
T For Sale Group 44 Replica TR7 V8 Twin Turbo Project - $25,000 Triumph Classifieds 0
M_Pied_Lourd Wedge TR7 Roadkill Extra... Triumph 0
J For Sale TR7 stripped shell and parts Triumph Classifieds 0
johnrip Wedge TR7 carb seeping fuel Triumph 21
J For Sale 1981 Triumph TR7 convertible fuel injected TR 7 Triumph Classifieds 0
C For Sale TR7/8 Group 44 tribute race car for sale Triumph Classifieds 6
johnrip Wedge TR7 fuel in carbon canister-twin carb model Triumph 10
johnrip Wedge tr7 electric fuel pump Triumph 2
johnrip Wedge TR7 fuel pump Triumph 0
A Wedge Looking at a '80 TR7 ...... Triumph 4
TRopic6 For Sale TR7 Gearshift UKC 3248 Triumph Classifieds 0
Got_All_4 Wedge TR7 drive train torquing Triumph 2
GTP1960 Wedge "TR7 End of an Era" Hemmings article Triumph 11
N Wedge '80 TR7 Alternator Options Triumph 2
johnrip Wedge TR7 Brake squeal Triumph 1
johnrip Wedge TR7 Brake squeal Triumph 1
tomshobby TR7 in TV show Spotted 2
johnrip Wedge TR7 had replaced rotors, now I have a noise and vibration-Wheel Bearing? Triumph 4

Similar threads

Top