Isuzu Trooper Owners Club UK™

dai990 · Newbie Joined: 14 Apr 2006 Posts: 7 Location: Durham

Can anyone help? My Trooper Bighorn 3.1D auto will no longer go into 4th gear. It changes through the box but refuses to go into 4th. The speedometer has also stopped working at the same time. I was told that it could be the speedo drive - so I have swapped this (secondhand part mind from internet dismantler). No change. Speedo still not working and still not going into 4th gear. Any ideas?

DAI990

Google · Sponsor

dai990 · Newbie Joined: 14 Apr 2006 Posts: 7 Location: Durham

Still not got problem solved. Checked speedo drive sensor not that. Checked pulse sensor on top of gearbox - not that. Checked all wiring to speedometer itself - nothing! Guy at garage reckond could be the speedo head itself - have a spare (I think). Will fit this and see!

siweb · ******* Joined: 18 Apr 2004 Posts: 1590

you got any check engine or check trans light showing?
_________________

dai990 · Newbie Joined: 14 Apr 2006 Posts: 7 Location: Durham

No lights showing at all. Also, all fuses checked etc. Guy at garage reckons must be the speedo head. Am going to try this tomorrow.
David.

siweb · ******* Joined: 18 Apr 2004 Posts: 1590

Not sure but I think the bighorn is all done via electronics. so theys no speedo cable only wires. i'll go and check. what year is yours?
_________________

siweb · ******* Joined: 18 Apr 2004 Posts: 1590

The spare auto gearbox i have in the sheds has not speed cable on it, Grandad he'll know for sure.

dai990 · Newbie Joined: 14 Apr 2006 Posts: 7 Location: Durham

Definately no speedo cable - all electronic. Apparently the speedo head will send a pulse out and that causes gear change into 4th. If speedo head not working then no pulse - hence no top gear.
David.

dai990 · Newbie Joined: 14 Apr 2006 Posts: 7 Location: Durham

problem now sorted. Speedo head gone so needed to change instrument binacle and that was that!