MartG
22-10-2007, 20:14
Due to my 1b shell dying of tinworm, I need to swap the uprated bits of the 1b suspension onto my 1a. Simplest way is to swap the whole lot over, but there is the issue of the differing rear suspension brackets - so I had a close look at the two shells...
The pic below shows the rear suspension bracket mounting area of my 1a. The 1a bracket attaches using bolt holes 1, 2, 3, and 7. The ARB fixes to holes 4 and 5 ( with a drain hole between them normally blocked by the ARB bush ), and 6 is one of the mounting holes for the exhaust heat shield.
It is difficult to see in this pic, but the crossmember actually curves slightly forwards toward its outer ends.
http://img230.imageshack.us/img230/173/1aholesrj6.jpg (http://imageshack.us)
Here we have a pic of the same area of my 1b - an important difference is that the front face of the crossmember curves forwards exactly the same as the 1a one, but the rear face doesn't - it runs straight across.
The holes all have the same number as on the 1a pic above, but note that hole 3 is missing entirely, hole 4 is now used for the suspension bracket rather than the forward ARB bolt, and there is a new hole ( 8 ) for the aft ARB bolt, and as the drain hole is no longer covered by the ARB bush a blanking plug is fitted. Hole 7 is also further inboard and lower down.
http://img530.imageshack.us/img530/2418/1bholessf5.jpg (http://imageshack.us)
Conclusions - to use the 1b rear suspension on the 1a chassis needs a new aft ARB mount bolthole to be drilled, a new transverse hole ( 7 ) to be drilled and spacing washers use to fill the gap where the 1a crossmember curves forwards ( and the 1a captive nut to be ground off and replaced )
Simple innit :thumleft:
The pic below shows the rear suspension bracket mounting area of my 1a. The 1a bracket attaches using bolt holes 1, 2, 3, and 7. The ARB fixes to holes 4 and 5 ( with a drain hole between them normally blocked by the ARB bush ), and 6 is one of the mounting holes for the exhaust heat shield.
It is difficult to see in this pic, but the crossmember actually curves slightly forwards toward its outer ends.
http://img230.imageshack.us/img230/173/1aholesrj6.jpg (http://imageshack.us)
Here we have a pic of the same area of my 1b - an important difference is that the front face of the crossmember curves forwards exactly the same as the 1a one, but the rear face doesn't - it runs straight across.
The holes all have the same number as on the 1a pic above, but note that hole 3 is missing entirely, hole 4 is now used for the suspension bracket rather than the forward ARB bolt, and there is a new hole ( 8 ) for the aft ARB bolt, and as the drain hole is no longer covered by the ARB bush a blanking plug is fitted. Hole 7 is also further inboard and lower down.
http://img530.imageshack.us/img530/2418/1bholessf5.jpg (http://imageshack.us)
Conclusions - to use the 1b rear suspension on the 1a chassis needs a new aft ARB mount bolthole to be drilled, a new transverse hole ( 7 ) to be drilled and spacing washers use to fill the gap where the 1a crossmember curves forwards ( and the 1a captive nut to be ground off and replaced )
Simple innit :thumleft: