Blown gearbox help

Technical questions and answers about the Mazda Bongo

Moderators: Doone, westonwarrior

Post Reply
mpihornet

Blown gearbox help

Post by mpihornet » Mon Sep 27, 2010 4:47 pm

Hi,

I have a 95 2.5 4x4 and some serious auto gearbox issues. A couple of weeks ago i put it into reverse but it would not go. i put my foot down and it clunked and went backward jerkily. My wheels were straight. Then it was fine. I thought it must be low on fluid and not engaging, so I bought some fluid and topped it up. we drove 350 miles and arrived home. i put it in reverse and it clunked again./ now when i start it, its really noisy in neurtral and park and stalls in reverse or drive. My guess is that the torque convertor is full of whatever gears i chunked earlier.

1 where can i get a replacement?
2 does the 2wd box use the same rear prop shaft?
3 has anyone done a 5 speed conversion? (i'd love to do that)
4 any help would be appreciated.

thanks

Richard
francophile1947
Supreme Being
Posts: 11354
Joined: Mon Dec 18, 2006 6:15 pm
Location: Norwich

Re: Blown gearbox help

Post by francophile1947 » Mon Sep 27, 2010 4:53 pm

Welcome to the madhose :D
Sorry, my knowledge of auto boxes is, at best, limited, but we have a couple of auto box experts on here, so one should be along shortly.
Regarding a replacement, you could try sending a PM to the 2 members who are breaking their Bongos - see http://www.igmaynard.co.uk/bongo/forum/ ... m.php?f=67 or there are some breakers advertising on the home page here http://www.igmaynard.co.uk/bongo/bongo.htm
Good luck :D
John
(Evidence that intelligent life exists in the universe, is that it hasn't tried to contact us)
User avatar
Alacrity
Tribal Elder
Posts: 634
Joined: Tue Jan 12, 2010 10:02 am
Location: Eastbourne, East Sussex
Contact:

Re: Blown gearbox help

Post by Alacrity » Thu Sep 30, 2010 5:07 pm

It sounds like you have broken the geartrain inside the transmission so a rebuild or a replacement 'box and converter will be in order. I don't know where you are in the country as you haven't listed that in your profile but there are a few rebuilders in the UK that I would recommend (& a whole lot more that I wouldn't! :shock: ). A used transmission will be your cheapest option, they are good units normally so you would be unlucky to get a duff one but you MUST make sure the oil cooler is correctly flushed through or you will get your replacement unit contaminated with debris from the failed old one. As transmission rebuilders we have specialised equipment just for this purpose.

Sorry but I can't answer any of your other questions.
35+ years working with autogearboxes - all day every day......for my sins
Post Reply

Return to “Techie Stuff”