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Land Rover Gearbox Identification including LT77 Gearbox vs R380 Gearbox

Here at Shop4autoparts we are often asked for help help in identifying which gearbox you have in your vehicle and general information on their history so we have put together the following information along with a quick guide as to whether you have an R380 Gearbox or an LT77 Gearbox. 

Whichever gearbox you have, our you should be able to find your required part here. If not please contact us and one of the team will be able to help you out.

 

Gearbox Type
Comments 
Serial No Style
 LT76 4 Speed
 
 LT95

4 Speed box with integral transfer box found in early Series III 109 V8, 110 V8, 101 FC and Range Rover

 
 LT77

5 Speed box fitted from 1983 to approx 1994

 

17A-74A Prefix

A-H Suffix

 LT85 5 Speed "Santana" box fitted from approx 1988 to 1991
20C & 22C Prefix
 R380 5 Speed box, replaced the LT77 fitted from approx 1994 to 2006

17A-74A Prefix

J on Suffix

 MT82 6 Speed Ford Getrag box introduced with Defender 2007 MY
 
 PG1  4 Speed used in Freelander & some Rover Car models
 

 

 

LT77 / LT77S / R380 Gearbox Serial No. Location

You should find the Gearbox Serial Number Stamped on a machined flat near the Drain Plug area, please see the picture below.

The Number Consists Of A Prefix e.g. 56A, then a six digit numerical, followed by Suffix Letter. Suffix A to H is an LT77 Transmission, Suffix J onwards is an R380 Transmission. You can also tell an LT77 Gearbox from R380 Gearbox by the position of the Reverse Gear on the Gearstick. If Reverse is next to 1st gear you have an LT77 gearbox (or possibly LT85, see LT85 section). If Reverse is below 5th you have an R380 transmission.


LT77 & R380 Identification By Gear Lever

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