Auto Gearbox not changing properly

Technical questions and answers about the Mazda Bongo

Moderators: Doone, westonwarrior

Locked
mickeymonkey

Auto Gearbox not changing properly

Post by mickeymonkey » Wed Apr 27, 2011 1:09 pm

Can anyone suggest what may be wrong. For the first few miles the auto gears do not change properly and the engine stays in too lower gear and over revs or bumps into gear. When I am out for a while it seems to improve and work normally.

Can oil need changing or is there anything more serious going on. I am not a mechanic in any way so best course of action would be appreciated.

Thanks
User avatar
mikeonb4c
Supreme Being
Posts: 22877
Joined: Sun Nov 05, 2006 10:49 pm
Location: Living with Mango Bongo in the North West but with a tendency to roam
Contact:

Re: Auto Gearbox not changing properly

Post by mikeonb4c » Wed Apr 27, 2011 1:16 pm

mickeymonkey wrote:Can anyone suggest what may be wrong. For the first few miles the auto gears do not change properly and the engine stays in too lower gear and over revs or bumps into gear. When I am out for a while it seems to improve and work normally.

Can oil need changing or is there anything more serious going on. I am not a mechanic in any way so best course of action would be appreciated.

Thanks
That sounds in some respects like normal behaviour for a Bongo autobox. Most noticeable on a cold winter morning than on a hot summers day. The box has to reach certain temps before the system allows it to change up normally.

But the behaviour of yours does sound a little extreme. Have a search on here for things to check for and correct etc. before anything else 8)

PS - put your location in your profile as maybe there is a techie owner near you who might offer to help.
wonkanoby
Supreme Being
Posts: 1729
Joined: Thu Nov 10, 2005 12:00 pm
Location: sunny catford

Re: Auto Gearbox not changing properly

Post by wonkanoby » Wed Apr 27, 2011 1:52 pm

i would drop the sump on box and clean filter and renew fluid as a starter
wonkanoby
Supreme Being
Posts: 1729
Joined: Thu Nov 10, 2005 12:00 pm
Location: sunny catford

Re: Auto Gearbox not changing properly

Post by wonkanoby » Wed Apr 27, 2011 1:53 pm

User avatar
waycar8
Supreme Being
Posts: 3037
Joined: Fri Mar 17, 2006 9:35 pm
Location: west yorkshire

Re: Auto Gearbox not changing properly

Post by waycar8 » Wed Apr 27, 2011 5:54 pm

If that fails to solve the problem, (but do that anyhow as it will probably due a change) also change the fuel filter, a partially blocked fuel filter gives the same symptoms.
Image
User avatar
mikeonb4c
Supreme Being
Posts: 22877
Joined: Sun Nov 05, 2006 10:49 pm
Location: Living with Mango Bongo in the North West but with a tendency to roam
Contact:

Re: Auto Gearbox not changing properly

Post by mikeonb4c » Wed Apr 27, 2011 6:00 pm

mickeymonkey wrote:Can anyone suggest what may be wrong. For the first few miles the auto gears do not change properly and the engine stays in too lower gear and over revs or bumps into gear. When I am out for a while it seems to improve and work normally.

Can oil need changing or is there anything more serious going on. I am not a mechanic in any way so best course of action would be appreciated.

Thanks
...but if you are not confiident about doing mechanical jobs, you could get a garage to do these jobs (Bongo specialist is perhaps best, or autobox specialist, if you have one local to you)
mickeymonkey

Re: Auto Gearbox not changing properly

Post by mickeymonkey » Wed Apr 27, 2011 7:31 pm

Thank you all i think I will print your replies ask my local mechanic and then take to my local Bongo outlet which is apparently 4 miles away
Locked

Return to “Techie Stuff”