8 replies to this topic

[ac427]

If i wanted to convert my DAM5626 case to the Cooper S / 1275GT ratios, can i buy the parts new to do it or do i need to seek out an older gearbox?

 

 

[Spider]

If you go back to your last thread on Gearboxes and Gear Ratios;-

https://www.theminif...-which-gearset/

 

I included a cheat sheet with all the 4 synchro gearsets, their ratios and their part numbers. The Gears applicable to the Cooper S Set are in Black, grab all those part numbers, punch them in to Mini Spares and see what they have available new. Off hand, I think they have them all.

[ac427]

If you go back to your last thread on Gearboxes and Gear Ratios;-

https://www.theminif...-which-gearset/

 

I included a cheat sheet with all the 4 synchro gearsets, their ratios and their part numbers. The Gears applicable to the Cooper S Set are in Black, grab all those part numbers, punch them in to Mini Spares and see what they have available new. Off hand, I think they have them all.

 

Thanks Spider, I remember your excellent sheet but i'm too thick to work out what would work with what.

 

I'll have a look for those part numbers.

Edited by ac427, 11 June 2022 - 01:22 PM.

[Spider]

OK, I recall that you have a complete DAM5626 Gearbox (not just the case) with unknown gears inside it.

Assuming that all parts inside it are Serviceable, you can use the Mainshaft, 1st Gear and Reverse from that.

You'll need;-

2nd Gear     22G1094

3rd Gear      22G1095
1st Motion Shaft     DAM3167
Laygear                 DAM3168    or   22G1040

 

The DAM3169 Laygear is the better one to use and will fit on the 3 step Layshaft you have but these were only used for about 2 years and are very rare. If you find you need to use the 22G1040 Laygear, you;ll need the earlier 2 step Layshaft and bearings to suit. Regardless of which Laygear is fitted, the end float will need to be checked and adjusted accordingly.

I'm sure that while the gearbox was in bits, you'd do at the very least a basic overhaul, replacing all the bearings and 'wear' parts as well as checking all other parts.

[ac427]

Is this a good 22G1095 Cooper S 3rd gear?

 

It has 21 teeth, the ID is approx 32.8mm

 

I placed one of John Guesses baulk rings on top of the gear to check for wear.

 

Do all gear have what look like a friction coating on them?

 

Sadly i can't find my feeler gauges to measure but the gap looks to be over 1mm using a steel rule.

 

Does that look within spec?

 

 

 

 

 

 

Edited by ac427, 13 May 2022 - 05:19 PM.

[Spider]

It does appear to be a 1968 - 1978 type 3rd gear. These weren't unique to the Cooper S but used in all Minis in that period, so don't pay Cooper S Tax for it ! Same with 2nd Gear.

[ac427]

It does appear to be a 1968 - 1978 type 3rd gear. These weren't unique to the Cooper S but used in all Minis in that period, so don't pay Cooper S Tax for it ! Same with 2nd Gear.

 

Thanks Spider, I have the Minispares version coming for the second gear and the first motion shaft. MS were out of the 3rd though and couldn't tell me when they would next have a 3rd gear in. So it was off to eBay.

 

Hard to tell from a photo i know but does the clearance look ok ?

Edited by ac427, 13 May 2022 - 08:13 PM.

[Spider]

I haven't seen Mini Spares stocking 3rd Gears for a long time now.

 

Hard to tell from a photo i know but does the clearance look ok ?

 

From a look, it appears OK.
 

[ac427]

I haven't seen Mini Spares stocking 3rd Gears for a long time now.
 

Hard to tell from a photo i know but does the clearance look ok ?

 
From a look, it appears OK.

Thanks Spider, It does seem strange that they stock the others. Perhaps they are running stocks down with a view to not getting them made anymore.