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Peugeot BE4 gearbox went bang. Why?

Peugeot BE4 gearbox went bang. Why?

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Discussion

Sensibleboy

Original Poster:

602 posts

45 months

Friday 4th August
quotequote all
I had my BE4 gearbox fitted with a shorter final drive about 300 miles ago and all was well until it suddenly went bang.

Was doing about 35mph in 3rd with very slight throttle applied at there was a massive bang and the car stood on its nose briefly.

The box had been behaving perfectly up until this point. No noises, gear change was perfectly smooth too.

It's not been stripped down thoroughly yet to see which gears have broken but there's definitely a load of gear teeth been broken off.

So does anybody know what can cause this to happen? It's like it's tried to select two gears at the same time.

GreenV8S

24,523 posts

204 months

Friday 4th August
quotequote all
Sensibleboy said:
So does anybody know what can cause this to happen?
Pointless to speculate until it's been stripped down.

Old Merc

1,846 posts

87 months

Saturday 5th August
quotequote all
Favorite on these Pug boxes is the diff gears.Excessive wear in diff housing, sun & planet gears out of line and break up,bang! car stops.Everyone I`ve seen there is a hole in the diff housing part of the box.

Sensibleboy

Original Poster:

602 posts

45 months

Saturday 5th August
quotequote all
Crown wheel and pinion are fine in this one.

Old Merc

1,846 posts

87 months

Saturday 5th August
quotequote all
I would be having a strong word with who ever built this box ?
I bet all those "bits" are whats left of the diff gears. They are A B C D in this image.
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stevieturbo

12,523 posts

167 months

Saturday 5th August
quotequote all
Sensibleboy said:
So does anybody know what can cause this to happen? It's like it's tried to select two gears at the same time.
That would be one to ask whoever took it apart to swap the diff and exactly what they done at that time