R380 Gearbox

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  1. R380 Gearbox Ratios
  2. R380 Gearbox
  3. R380 Gearbox Parts
  4. R380 Gearbox Tunnel
  1. The R380 (top photo) is a suburb transmission and should have no problems with power outputs well above 300bhp, and, as you can see, in terms of fitment is the same as the LT77 (bottom photo), making the conversion very simple, and the ideal choice for your Rover V8 application, with the additional advantage of the short Remote or std.
  2. A common fault on the early R380 gearboxes was the 4th gear baulk ring. The slot locating the synchro slipper wears and allows the baulk ring to rotate too far. This blocks the synchro assembly. It will be necessary to rebuild the gearbox, and replacing the baulk ring with a later type will eliminate this fault.
  3. There are three types of 5 speed mainbox, LT77, R380 and LT85 (Santana). The following questions will help identify which type of box you have. 1) Is reverse underneath 5th gear? If yes, you have an R380.

R380 4 Gear problem. Thread starter jifjaf; Start date Oct 4, 2004; J. Jifjaf In Third Gear. Oct 4, 2004 #1 The gearbox in my 300 disco has a problem changing down.

Hi,
I was hoping to drop the engine into my pilgrim chassis whilst I have some time on my hands during this pandemic, but it looks like when I was hunting down a gearbox a couple of years ago I made an error; I purchased an R380 out of an LDV van hoping it would fit but now it has finally come to mating the engine and gearbox, I have discovered that the input shaft is fractionally (circa 15-20mm) too long. I looked at adding a spacer but this would also move the input splines the majority of the way out of the clutch plate, is there another option other than flogging this and spending a load more money on an alternative?
Thanks for any assistance.

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MANUAL GEARBOX

OVERHAUL

R380 Gearbox

31

Reverse and 5th gear - Reassembly

1. Fit mainshaft reverse gear selectable washer,

bush and needle bearing.

2. Fit mainshaft reverse gear and synchromesh

baulk ring.

3. Fit layshaft reverse gear.
4. Assemble selector spool, selector fork and

reverse /5th gear synchromesh hub. Fit as one
assembly to mainshaft splines and selector
shaft. (Ensure synchromesh baulk ring locates
inside hub).

5. Fit new circlip.

NOTE: The fit of the circlip is controlled by
the selectable washer behind the reverse
gear. Adjust to

0.005 - 0.055mm (0.0002 -

0.0021in).

6. Fit 5th gear split needle bearing.
7. Fit 5th gear and 5th gear synchromesh baulk

ring to mainshaft, fit layshaft 5th gear.

8.

Later gearboxes: Fit split washer to retain
layshaft 5th gear.

R380 Gearbox Ratios

NOTE: Bevelled side of washer must face
towards gear.

9. Fit new mainshaft thrust collar roll pin. Locate

5th gear thrust segments and retaining ring.

R380 Gearbox

10. Using LRT-37-023 to hold layshaft 5th gear,

tighten the layshaft 5th gear nut to 220 Nm.

R380 Gearbox Parts

11. Stake layshaft 5th gear nut.

R380 Gearbox Tunnel