Crank Endfloat and Destroying Gearboxes?? *DONT DELETE*

321Away · Post by **321Away** » Mon Sep 17, 2012 11:27 am

Its not in the book cos i've looked!! anyone have any idea what the crank endfloat should be on a 2000 2.5TD bongo?? have 1 that has about 10mm and has apparently destroyed 2 gearboxes (according to the customer/mazda dealer). Personally thought there was enough movement space in the input shaft/torque converter but apparently not! Have checked on couple of engines on the floor and it seems more like 3-4mm, just wondering if anyone has come across this before?

Julian

321Away · Post by **321Away** » Mon Sep 17, 2012 3:20 pm

In case anyone ever comes across this problem! there are 4 shims placed either side of the central shell, if 1 slips it allows movement which in turn destroys the remaining 3 and allows the crank to float, which (apparently) in turn mashes the input shaft intio the gearbox and your up the creek! so suggestion for anyone who's developed gearbox problems for an unknown reason, stick a bar behind the crank pulley and give it a wiggle, see how much float you have!

Julian

teenmal · Post by **teenmal** » Mon Sep 17, 2012 3:47 pm

Hi,does this help you

Standard end play for wltd engine
0.040—0.282 mm {0.0016—0.0111 in}
Maximum end play
0.300 mm {0.012 in}

Cheers.

PS the shims are Thrust bearings Standard sizes are 2.455 to 2.5680.

dave_aber · Post by **dave_aber** » Mon Sep 17, 2012 3:48 pm

10mm is quite excessive then!

Velocette · Post by **Velocette** » Mon Sep 17, 2012 4:31 pm

dave_aber wrote:10mm is quite excessive then!

I guess it has gone beyond just worn or missing shims then

mikeonb4c · Post by **mikeonb4c** » Mon Sep 17, 2012 7:01 pm

This is hot stuff Julian and thanks++

I wonder what factsheet we could add it to so it doesn't get buried?

Post by **Doone** » Thu Sep 20, 2012 10:45 am

Although this is an unsual problem, it's useful information. I've added it to the FAQ forum ON THIS LINK.
The bongo involved was a 2.5d automatic and the parts that caused the problem are numbered 23-201 ON THIS DIAGRAM

Thanks for this info Julian.

Info on other transmission faults can be found in the members area ON THIS LINK

Titan1995 · Post by **Titan1995** » Thu Sep 20, 2012 11:42 am

Yet another idiosyncrasy of the Bongo ......

Will check end float later today as doing other work on my Bongo.

Thanks for that Julian.

Crank Endfloat and Destroying Gearboxes?? DONT DELETE

Crank Endfloat and Destroying Gearboxes?? DONT DELETE

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