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What will this OD fit / what unit is it?

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Tom,

Need bottom to see if it's a J type.

The other pictures look like it's had motor oil in it, so it could be Triumph. All Volvo units ran with ATF and it was red at that time.
 
Hi Paul.

A-types had a vertical solenoid so it's not an A-type.

Doesn't look like a J-type to me since the J-type sump cover panel is finned.


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Looks A-typish to me, but non-triumph? That hex drain plug is on the bottom so in most shots the overdrive is upside down.

edit- Skip might be right there, I've never worked on a D-type.
 
Tom, not all A-types had a vertical solenoid (not even all Triumph A-types, let alone those fitted to other cars). I'm pretty sure that is an A-type, from a non-Triumph. Laycock ODs were used in practically all British cars of the period, plus other makes (like Volvo) so there are many possibilities.

Here's a shot of a similar solenoid arrangement, from the A-type service manual
 
It looks like that might be for a Jaguar if the catalog entry I found is right. Seems to at least show the MK II used it.

MK VII-IX, MK II to 1965 (models 28/1474 & 28/3028), XK-140 & 150

Scott
 
So, you going to mail that MK2 overdrive unit to me?
Dave

(sure doesn't look like a MK2 from my books, anyway)
 
Here's a link to the catalog that had that entry in it:
Jaguar overdrive

Here's another Jaguar catalog from them (XKs Unlimited?) that mentions that model as well.
Jaguar catalog

Definitely not real clear as to the specific application.

Scott
 
HerronScott said:
Here's a link to the catalog that had that entry in it:
Jaguar overdrive

Here's another Jaguar catalog from them (XKs Unlimited?) that mentions that model as well.
Jaguar catalog

Definitely not real clear as to the specific application.

Scott
Click to expand...
Interesting.

Back in the late 70s, while employed at Austin-Healey West, XKs Unlimited used to bring their overdrives to me for rebuilding. Most of the time, I got just the gearbox, but often they'd bring back the whole car to get it adjusted properly.

I once made the mistake of putting the "hood" down on an XK140dhc, and discovered the threads were rotted around the rear window when putting it back up. So ended our relationship!

Thirty-some (30+) years later, I'm still rebuilding overdrives, this one for a restoration shop in Michigan.

IMG_7839.jpg
 
Dave,

Found some MKI/MKII Jaguar factory parts manuals on-line and they show the 28/1474 overdrive was used in the 3.4 litre models. The 2.4 and 3.8 litre models used different model overdrive units.

Jaguar factory parts manuals

Scott
 
That's why my 2.4L parts book and service manual look different, eh?
 
So an OD from a MkII 2.4 will work on a MkI 2.4? <he said hopefully knowing his brother has one and might let him have it!> :smile:
 
In addition to my TR4's, I have 2 Jaguar MK1 3.4 sedans. The rear mount on this unit is identical to the ones on the MK 1's and MK 2's. I am currently in the process of moving my parts stash from a storage shed (no lighting), to my garage. When daylight comes, I will check the numbers on the spare OD units I have to verify this.

I am just speculating on this, but the early series 1 E-Type shared many mechanical components with the sedans. The same seller has a triple S.U. set-up that appears to be from an early E-Type. So, this particular unit MAY have come from the same vehicle. Perhaps those more knowledgeable can comment on this.
 
Verified! I just remembered that I had an extra MK 1 spare parts catalog in the basement, and it confirms that the 28/1474 OD was used on the 3.4 MK 1. But, it also may have been used on other models.

Note that unlike Triumph, Jaguar lists the manufacturers PN (i.e. - Lucas, Smiths, Laycock, etc.) along with Jaguar's PN in their Spare Parts Catalogs. I sure wish Triumph had done this.
 
Silverghost said:
So an OD from a MkII 2.4 will work on a MkI 2.4? <he said hopefully knowing his brother has one and might let him have it!> :smile:
Click to expand...

Peter,

That's what the factory parts manuals seemed to indicate. You might want to download them from that link I posted. Does your brother owe you any favors? :smile:

Scott
 
Randy Forbes said:
Back in the late 70s, while employed at Austin-Healey West, XKs Unlimited used to bring their overdrives to me for rebuilding. Most of the time, I got just the gearbox, but often they'd bring back the whole car to get it adjusted properly.

I once made the mistake of putting the "hood" down on an XK140dhc, and discovered the threads were rotted around the rear window when putting it back up. So ended our relationship!

Thirty-some (30+) years later, I'm still rebuilding overdrives, this one for a restoration shop in Michigan.
Click to expand...

Randy,

Very interesting! So do you just rebuild overdrives as a sideline?

Scott
 
HerronScott said:
Randy Forbes said:
Back in the late 70s, while employed at Austin-Healey West, XKs Unlimited used to bring their overdrives to me for rebuilding. Most of the time, I got just the gearbox, but often they'd bring back the whole car to get it adjusted properly.

I once made the mistake of putting the "hood" down on an XK140dhc, and discovered the threads were rotted around the rear window when putting it back up. So ended our relationship!

Thirty-some (30+) years later, I'm still rebuilding overdrives, this one for a restoration shop in Michigan.
Click to expand...

<span style="font-weight: bold">Randy,

Very interesting! So do you just rebuild overdrives as a sideline?

Scott </span>
Click to expand...
Not just, but I happened to do a couple of them back to back since the 1st of the year. I did my own, with a full complement of polymer coatings (thermal barrier/thermal dispersant and dry-film lubricant) and there's an all British restoration shop just over the stateline (in Michigan) that has me doing some work for them too. See: https://www.rfdm.com/gallery/album168

Mostly, I work BMW M Coupes/Rdstrs, but I happen to have owned the same 100/6 2-seater for more than thirty (>30) years. That's way more British car experience (punishment?) than anyone deserves. :wink:

DO you need an overdrive, or transmission/overdrive rebuilt?
 
Randy,

Not yet! I've got overdrives in both my TR4A's and plan on getting one for the TR3, but at the moment all cars are in storage until I get a garage built.

I'll keep you in mind though! I rebuilt the transmission in my original TR4A and converted it to overdrive at the same time, but I just bolted the working overdrive unit on (Hey I was young and doing things as inexpensively as possible back in 85!). Luckily, I had no problems with it but I did put another 70,000 miles on it after that.

Scott
 
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