Member Since: 07 Jul 2012
Location: Chester
Posts: 181
Transmission thump
Hi can anyone shed some light on a new sound effect?
Now when I put the transmission into drive (it's an auto) I get a thump it's as if the 'slack' is taken up, this has only appeared in the last week or two, 70k on it and no heavy towing.
It only thumps when drive is engaged it doesn't do it when it's put into reverse.
Does the transmission have a rubber donut or similar?
Any suggestions where to start looking?
23rd Jul 2013 7:32 am
Advanced Factors Site Sponsor
Member Since: 27 Nov 2012
Location: Southampton
Posts: 2649
There is a centre mount, the bearing is suspended in rubber, perhaps that bond is broken, there have been cases of it reported here.
It can be glued again using something like Tiger Seal. There are suppliers for this mount but not very nice to do and haven't been impressed with the quality of the part, or it's a new prop from LRPaul Redding
+44 (0)23 8052 2774
Order Parts Online at www.advancedfactors.co.uk
23rd Jul 2013 7:38 am
Dave
Member Since: 08 Mar 2006
Location: North Yorkshire
Posts: 2462
Similar here, mine also does an F if you select reverse quickly I.e it seems surprised!
Even after a transmission flush the thump returned after 2 days. It is mostly when my gearbox is cold. I am interested to hear your replies so I can relate to my issue Captain Nick Medhurst would ask:
"What is the first rule when overlanding?"
I would Reply:
"Duratrac"
23rd Jul 2013 7:40 am
Markmein
Member Since: 07 Jul 2012
Location: Chester
Posts: 181
Well it's an investigation for the weekend I guess, had a quick look but I'll need to get the heat shields off to get proper access.
I'll get a tube of tiger seal just in case...
24th Jul 2013 8:44 pm
Markmein
Member Since: 07 Jul 2012
Location: Chester
Posts: 181
Well the slack/ thump seems to be the transfer box, i don't know what is a normal amount of backlash so its difficult to say if this is good or bad.
How much slack is normal in the transfer box?
21st Aug 2013 1:32 pm
aljo
Member Since: 20 May 2007
Location: west sussex
Posts: 804
Could it be a slack chain in the transfer box ? Last night I lay in bed looking up at the stars in the sky and I thought to myself, where,s the f**king ceiling!!
21st Aug 2013 1:42 pm
Markmein
Member Since: 07 Jul 2012
Location: Chester
Posts: 181
My thought but i don't know how much movement there would normally be there, guess ill have to find one to climb under and check...
21st Aug 2013 1:53 pm
H16UUP
Member Since: 01 Dec 2012
Location: Stockport
Posts: 271
Was under mine the other night. No rotational movement in the prop shaft, and no movement in the UJs (check those 1st by the way).
About 1-2mm of forwards/backwards movement in prop.
Hope this helps.
21st Aug 2013 2:21 pm
Beretta
Member Since: 11 Oct 2012
Location: Rochdale
Posts: 1180
Fixed?
Markmein - Did you ever get this sorted? This is very similar to the problems I am having at the moment.
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