tr6 Broken diff front mounting plate dilemma

[BrianC]

One of our local group members has recently bought a very nice TR6 and discovered this problem:

 

"I think I told you about my TR6 diff problem (the front mounting plate has sheared). The 4 locating pins seem ok but won't know for sure until the diff is off. I will get them boxed in at a later date.

Moss are selling a new mounting plate for about £130. Imported from the USA (probably made in Mexico!). Revington will sell me a repaired strengthened exchange unit for about £170. Or I could get mine welded back together and strengthened. What would you do?"

I can't advise from personal experience (it's one of the reasons I dislike IRS TRs) but I have forwarded it to a few other TR6 owners and I'm sure there will be plenty of practical advice on here.

 

[RogerH]

Hi Brian,

if it is what I think then I had something similar on the 4A.

It started from a corner where the plate had a flange folded to 90'.

I welded the two pieces back together and made sure there were no more sharp corners.

 

I would suggest weld it together smooth the corners and re-fit it.

 

Roger

 

 

 

 

[Peter Cobbold]

Weld it. Mine, on a 6, fractured vertically about 1" inboard from Roger's. I did it myself with nogas MiG. Good seam weld, by my standard, both sides. Diff off car. Has given no problems for past 25 years.

Peter

[Guest ntc]

Yep weld it,however they only crack if there was other issues

[AlanT]

What have you got to loose by welding it? If it cracks again not much will happen.

 

You wil need to grind out and weld in the V-shape produced. possibly equal on both sides but one side would do.

 

If I weld a thing like this I try to add a bit of re-inforcment and remove sharp edges and corners.

 

Oh and drill to stop the crack is the old time practice.