Pontiac Owners Club UK

Trying to reinstate speedo. New cable, and 19 tooth natural colour drive gear installed on 80mph gauge and Borg warner 4 speed. Needle jumps about and mileage not clicking up enough. I took cog out of gearbox attached drill to cable end and cable moved easy with gauge reading steady speed. Put cog back on and installed in gearbox it jumps about again. Worm gear on shaft feels good too. Any ideas?

sounds the same as mine !!!!!!

dont have an answer though

try feeling worm gear while someone turns the prop (rear jacked clear of ground) check for run-out

Closer inspection feeling with little finger, it seems the metal part in the gearbox that the cable's drive gear shaft sits in has worn or broken slightly on one edge. This probably makes the cog stick and jump. Waiting for payday then looking at a speedhut gps version to fit dash. Unless anyone has a better idea?

Sounds good to me!

maybe the gps speedo needle will actually move one day

Yeah, should do mph. That will be doing, dpy........days per year...

10 000 rpm tach on a v8

looks good tho.

my cars done (3rd gen i mean) 700 miles this week alone . big road trip ran like a dream too. 1800 rpm most of the time @70mph not 10k

thirdgen wrote:10 000 rpm tach on a v8

looks good tho.

my cars done (3rd gen i mean) 700 miles this week alone . big road trip ran like a dream too. 1800 rpm most of the time @70mph not 10k

Kevs not told us his engine is actually a 2 stroke V8!

i like the clocks, if your'e not going the original route they are the best looking i,ve seen.