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Rover 5 speed speedo drives (LT77 etc)
Posted: Mon Apr 27, 2009 7:38 pm
by Coops
well as i have to keep trawling the net finding this info out ,
i thought its time we listed them here:
Speedo transducer; 1982 onwards (electronic speedo). 2 pin connector
3500 (20 teeth, orange) 3.08:1 axle ratio.
2600/2300 (23 teeth, black) 3.45:1 axle ratio.
2000/2400TD (22 teeth, red) 3.09:1 axle ratio.
Total terminal security connector
3500 (20 teeth, orange) 3.08:1 axle ratio.
2600/2300 (23 teeth, black) 3.45:1 axle ratio.
2000/2400TD (22 teeth, red) 3.09:1 axle ratio.
Speedo drive gear; 1976 - 1982. Models with mechanical speedo.
3500 (20 teeth, orange) 3.08:1 axle ratio.
2600/2300 (23 teeth, black) 3.45:1 axle ratio.
? (24 teeth, blue) axle ratio ?
? (21 teeth, green) axle ratio ?
? , (25 teeth, white) axle ratio ?
If any one knows of any others please let me know,
colour, teeth, which model (uses LT77 or R380 varients), mechanical or electronic
Posted: Wed Apr 29, 2009 6:58 pm
by Coops
added a white 25 teeth drive now as on Robsport,
can any one throw any light on what axle ratios the random ones are for??
also robsport list:
TR7 PARTS (GEARBOX 5-SPEED)
Condition: New
Description: Speedo drive, 22 teeth, red
Part No: 219003
Price: £20.95
which is for a 3.09:1 ratio,
do you think this is a mechanical drive? and not electronic?
Posted: Tue Feb 07, 2012 9:35 am
by bodger
I have had no end of hastle with the speedo drive as mine is a convoy van with a TR7 box and V8 ..what i have done is to use my GPS and remark the speedo face after painting out the orginal numbers
Posted: Tue Feb 07, 2012 11:21 am
by DaveEFI
bodger wrote:I have had no end of hastle with the speedo drive as mine is a convoy van with a TR7 box and V8 ..what i have done is to use my GPS and remark the speedo face after painting out the orginal numbers
If you're handy at building electronics, Jaycar do a unit which converts the pulse count from the sensor to anything you want to drive your speedo.
Obviously, no use with mechanical types.
Posted: Wed May 09, 2012 1:11 pm
by bodger
Having tried a couple of these drive pinions ...they only make 2 or 3 mph differance ....
what really makes the differance with the drive is the internal gear ..
there are 3 types as far as i can gather .
BLACK = SD1
WHITE = TR7
and a GREY one which is LDV only
..and will only fit the LDV boxers as they have a larger diameter output shaft , i beleive that the R380 also has the larger diameter shaft too ??
there are also BLACK ones with a larger diameter hole too as i have one
Posted: Wed May 09, 2012 2:03 pm
by DaveEFI
The black SD1 one is for a 3.45:1 axle. The more common one for a 3.08:1 is orange - all manual V8s have this ratio.
Posted: Wed May 09, 2012 3:40 pm
by bodger
DaveEFI wrote:The black SD1 one is for a 3.45:1 axle. The more common one for a 3.08:1 is orange - all manual V8s have this ratio.
Dave , what i mean is the internal gear that the pinion meshes with
Posted: Wed May 09, 2012 9:57 pm
by DaveEFI
Far as I know both gears should be the same colour.
Posted: Mon Jul 02, 2012 10:20 am
by bodger
not really Dave , the LDV one is a white for the pinion gear and a grey internal one
Posted: Sat Aug 11, 2012 7:37 am
by conrod
can anyone tell me the part number of the 21 tooth green drive gear please? Or even the 20 tooth orange gear? Preferably the Landrover part number. The Landrover with the LT77S gearbox still uses these same gears, even though the drive comes out of the transfer case. Is there an online website with parts diagrams/part numbers for Landrover parts?
Posted: Sun Aug 12, 2012 10:06 am
by ChrisJC
OK. Here are three screenshots from MicroCat - the Land Rover Parts Catalogue. Apologies for their size!
Note that all are for 3.54:1 axle ratios.
Not sure if it helps!
Chris.
Posted: Sun Aug 12, 2012 10:41 am
by conrod
brilliant, thats a big help! Thanks Chris:)
Conrad
Posted: Tue Nov 13, 2012 3:43 pm
by bodger
the pinions are differant from the 2WD LT77 ones .. they are a differant shape than the Landy ones
i have several orange and black ones with bearings for sale
Posted: Tue Nov 13, 2012 8:46 pm
by conrod
thats interesting, I bought a green one for a Landy LT77S and it is the same shape as the one in my R5-150 box, which was essentially the last "evolution" of the LT77 2WD box.
Posted: Tue Nov 13, 2012 9:26 pm
by bodger
conrod wrote:thats interesting, I bought a green one for a Landy LT77S and it is the same shape as the one in my R5-150 box, which was essentially the last "evolution" of the LT77 2WD box.
ah ha that is interesting , the ones i have seen are helical cut in the 2wd and straight cut in the landy ones .
i have about 15 of the things here i'l have to word my ebay ad ... lol