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Maverick



Member Since: 08 Mar 2008
Location: Inverurie!
Posts: 261
Scotland 1996 Defender 90 300 Tdi CSW Alpine White
Puma Gearbox in 300TDi
Is it possible to fit the gearbox out of a puma into a 300TDi. Been doing a few dual carriageway journeys and was just thinking how nice a 6th gear would be. Would it be possible without too much work, or am I just dreaming?
TIA Ben

Rebuilt 1996 black/white Defender 90 300 TDi
Post #116467 18th Jan 2012 1:35pm
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T1G UP



Member Since: 08 Dec 2009
Location: Bath
Posts: 3101
England 2011 Defender 110 Puma 2.4 XS CSW Orkney Grey
overdrive
Post #116490 18th Jan 2012 3:13pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6645
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Discovery transfer box  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #116493 18th Jan 2012 3:48pm
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Maverick



Member Since: 08 Mar 2008
Location: Inverurie!
Posts: 261
Scotland 1996 Defender 90 300 Tdi CSW Alpine White
Disco transfer box was my other plan. Thumbs Up Was wondering if it had been done/could be done though Smile Ben

Rebuilt 1996 black/white Defender 90 300 TDi
Post #116496 18th Jan 2012 4:02pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17626
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Never heard of anyone doing this, but there's no doubt that it is theoretically possible. You would need to fabricate suitable adaptors to sort out the bellhousing (bit like we used to in the good old days of fitting Ford V6s and Rover V8s into Series Ones before adaptors became available off the shelf). The GFT MT82 box would probably fit your existing transfer box, or else you could get a complete Puma gearbox/transfer box assembly.

However, it is almost certainly not the sensible (ie cost effective and mechanically sound) way to achieve the desired result, and the suggestions above (Disco transfer box or overdrive) would be simpler, probably cheaper, and possibly more satisfactory.

You will no doubt be aware that the MT82 box is generally not held in very high regard - you have only to read the posts on this forum to see that. Personally I actually like it, and think it is no worse that the R380 box that preceded it (which was exactly perfect itself), but an awful lot of people have had "issues" with them. They do seem to suffer if there are any transmission problems anywhere in the driveline.

If I was in your position I would fit an overdrive if I wanted the extra gear, or the Disco 2 ratios if I simply wanted higher gearing.
Post #116498 18th Jan 2012 4:09pm
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Maverick



Member Since: 08 Mar 2008
Location: Inverurie!
Posts: 261
Scotland 1996 Defender 90 300 Tdi CSW Alpine White
T1G UP - Can't justify the cost of an overdrive for an extra gear just now

Sounds like its back to a Disco transfer box, thanks for the input guys! Thumbs Up Ben

Rebuilt 1996 black/white Defender 90 300 TDi
Post #116504 18th Jan 2012 4:18pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6645
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
On a 300 Tdi it's easy peasy, get a 300 Tdi Disco transfer box Smile

Doesn't take long to swap, see if you like it. I can't believe I ummed and ahhhed about doing mine for so long, it's magic Smile  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #116511 18th Jan 2012 4:35pm
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Maverick



Member Since: 08 Mar 2008
Location: Inverurie!
Posts: 261
Scotland 1996 Defender 90 300 Tdi CSW Alpine White
I've been looking at it for a while, but not had the time to do it. But with it going off the road this summer I might as well! Smile Thumbs Up Ben

Rebuilt 1996 black/white Defender 90 300 TDi
Post #116521 18th Jan 2012 4:55pm
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3660
United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
there is a GKN overdrive on the bay at the mo that has a low start but an electrical fault DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #116555 18th Jan 2012 7:16pm
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cinstone



Member Since: 29 Nov 2010
Location: Stourbridge
Posts: 375
England 2015 Defender 90 Puma 2.2 XS CSW Keswick Green
Apart from cost and the manufacture of suitable adapter plates etc., could you live with a very low 1st gear?

Chris. http://shropshirelandrovers.freeforums.org

2015 Defender 90 XS SW & Helen, 1964 IIa. Previously 2012 Defender 90 XS SW & 2008 90 XS SW.

Previous LR's: Michael, my 2008 Defender 90 XS SW.

Machinas oportet intrare non capsicum annuum faveo
Post #116710 19th Jan 2012 10:16am
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JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443
England 2002 Defender 110 Td5 SW Coniston Green
Forgive me if I'm speaking from the other end, but if you put in a new 6 speed box then you won't gain a lot as the Puma transfer box has Disco ratios in allready, so just might as well just do the transfer box
Post #116715 19th Jan 2012 10:44am
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Lookers Park Royal



Member Since: 19 Jun 2008
Location: London
Posts: 338
United Kingdom 
Martin wrote:
On a 300 Tdi it's easy peasy, get a 300 Tdi Disco transfer box Smile

Doesn't take long to swap, see if you like it. I can't believe I ummed and ahhhed about doing mine for so long, it's magic Smile


As Martin says get a Disco transfer box. I bought one from the classified for mine for £30 and am having it fitted on 25th of this month. I'll let you know how I get on, assuming that the box I bought isn't full of nails!

James Thumbs Up
Post #116725 19th Jan 2012 11:55am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17626
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
cinstone wrote:
Apart from cost and the manufacture of suitable adapter plates etc., could you live with a very low 1st gear?

Chris.


Actually, that is an interesting point, since low 1st would be excessively low with the 300Tdi transfer box. Also, since the 300Tdi does not have the idle jack as programmed into the TDCi, hill descents in low 1st would become dangerous.
Post #116736 19th Jan 2012 12:44pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8184
 2011 Defender 110 Puma 2.4 USW Stornoway Grey
i doubt you will get the box to fit, its very long and adaptors plates are apparently a nightmare, or so i was told by a very reliable firm who specialise in transmissions.

1.2T t box

or the O/D, if its got an electrical fault just bypass the speed sensor and sort a switched supply to the solenoid. its normally the speed sensor that has the problem. Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #116779 19th Jan 2012 2:58pm
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cinstone



Member Since: 29 Nov 2010
Location: Stourbridge
Posts: 375
England 2015 Defender 90 Puma 2.2 XS CSW Keswick Green
blackwolf wrote:
cinstone wrote:
Apart from cost and the manufacture of suitable adapter plates etc., could you live with a very low 1st gear?

Chris.


Actually, that is an interesting point, since low 1st would be excessively low with the 300Tdi transfer box. Also, since the 300Tdi does not have the idle jack as programmed into the TDCi, hill descents in low 1st would become dangerous.


Great point Thumbs Up.

Chris. http://shropshirelandrovers.freeforums.org

2015 Defender 90 XS SW & Helen, 1964 IIa. Previously 2012 Defender 90 XS SW & 2008 90 XS SW.

Previous LR's: Michael, my 2008 Defender 90 XS SW.

Machinas oportet intrare non capsicum annuum faveo
Post #116801 19th Jan 2012 4:35pm
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