Car not passing 120kmh

Graphix1 · Postby **Graphix1** » March 17th, 2011, 7:35 pm

Sr-20de with a 4 speed cable tranny

1st and 2nd building speed but when i reach 3rd the rpm just stays there and the speed doesn't build any more,if i kick down to 4th it starts back to move a little but no further than 120.

this started to happen a while after i used cheap tranny oil,don't know if this caused it of if there could be another reason but i changed the oil again and put castrol but no difference...

NXTREME · Postby **NXTREME** » March 18th, 2011, 9:44 am

if the tranny damaged, no matter what oil u used it wont work, is the tranny slipping at all? i.e. over revving? what rpm are you at while doing 120?

THE SYNDICATE · Postby **THE SYNDICATE** » March 20th, 2011, 3:03 pm

^^^what he said!

Graphix1 · Postby **Graphix1** » March 20th, 2011, 11:09 pm

about 3900,it never crosses 4.....

tranny doesn't feel like its slippin but it doesn't pull off in drive gear when d tranny cold,i does have to run 2nd for a while and then let it get hot and try to get drive to engage.....

NXTREME · Postby **NXTREME** » March 21st, 2011, 6:55 am

carry it by a transmission expert...u shud have it pulled down an checked. i wonder if its the converter?

Graphix1 · Postby **Graphix1** » March 21st, 2011, 9:29 pm

well thas wa everybody sayin,cause usually if the tranny givin out it's 1st and 2nd that goes first not 3rd,so i'll change the converter and see if that helps

ramishrrr · Postby **ramishrrr** » March 21st, 2011, 10:38 pm

Check your exhaust system. It is possible that you have plugging in your cat converter, resonator or silencer.
Regards,
RR.

Graphix1 · Postby **Graphix1** » March 22nd, 2011, 7:01 pm

last night i popped the bonnet and the ring around the oxygen sensor was red hot,i also believe the seal on the exhaust is leaking cause if i rev i see smoke coming from behind the shield if front of the block....not sure if that has something to do with it...

rollingstock · Postby **rollingstock** » March 22nd, 2011, 10:58 pm

Too much backpressure check what ramishrrr posted.

ramishrrr · Postby **ramishrrr** » March 23rd, 2011, 3:37 am

It is normal to see parts of the exhaust manifold red hot if the bonnet is popped in a dark area, after hard running. Temperatures can exceed 500 deg. F.
But I have seen plugged catalyst cartridges, and plugged silencers hold back cars while you are "X to board". Man, you could get out and run faster than the car !
Regards,
RR.