V12/gearbox bolt patterns
#1
V12/gearbox bolt patterns
Can anyone help please:
The 6 litre factory XJR-S had a GM400 gearbox part number: SPE1027
https://www.jaguarclassicparts.com/u...ic-jaguarsport
Ordinary 6 litres had a 4 speed box, I believe. My question is as follows:
Does the GM400 part number SPE1027, as used in the factory JaguarSport 6 litre cars have the same bolt pattern as the 5.3 litre V12 engines, or does it have the later bolt pattern as used on the 4 speed boxes on facelift cars?
Thanks in advance for any help anyone can give.
The 6 litre factory XJR-S had a GM400 gearbox part number: SPE1027
https://www.jaguarclassicparts.com/u...ic-jaguarsport
Ordinary 6 litres had a 4 speed box, I believe. My question is as follows:
Does the GM400 part number SPE1027, as used in the factory JaguarSport 6 litre cars have the same bolt pattern as the 5.3 litre V12 engines, or does it have the later bolt pattern as used on the 4 speed boxes on facelift cars?
Thanks in advance for any help anyone can give.
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Just to add my 2c worth.
Baxtor is correct all Jaguar 5.3L HE's and TWR 6.0 and 6.1L that used the TH400 had the same bolt pattern. This bolt pattern was also used by Jeep.
The Jaguar 6.0L and 4speed auto had a different bolt pattern that was also used by Rolls Royce, I have not been able to find any other info on this bellhousing.
The Jaguar 6.0L block still has the pads for the TH400 but these are not drilled. So a TH400 can be bolted to a later 6.0L block without an adapter. But a Jaguar 4L80 can not be bolted to a 5.3L without an adapter.
Baxtor is correct all Jaguar 5.3L HE's and TWR 6.0 and 6.1L that used the TH400 had the same bolt pattern. This bolt pattern was also used by Jeep.
The Jaguar 6.0L and 4speed auto had a different bolt pattern that was also used by Rolls Royce, I have not been able to find any other info on this bellhousing.
The Jaguar 6.0L block still has the pads for the TH400 but these are not drilled. So a TH400 can be bolted to a later 6.0L block without an adapter. But a Jaguar 4L80 can not be bolted to a 5.3L without an adapter.
The following 3 users liked this post by warrjon:
#5
Just to add my 2c worth.
Baxtor is correct all Jaguar 5.3L HE's and TWR 6.0 and 6.1L that used the TH400 had the same bolt pattern.
The Jaguar 6.0L block still has the pads for the TH400 but these are not drilled. So a TH400 can be bolted to a later 6.0L block without an adapter. But a Jaguar 4L80 can not be bolted to a 5.3L without an adapter.
Baxtor is correct all Jaguar 5.3L HE's and TWR 6.0 and 6.1L that used the TH400 had the same bolt pattern.
The Jaguar 6.0L block still has the pads for the TH400 but these are not drilled. So a TH400 can be bolted to a later 6.0L block without an adapter. But a Jaguar 4L80 can not be bolted to a 5.3L without an adapter.
The following users liked this post:
Jonathan-W (05-04-2017)
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#7
I would have to see it to believe it as it makes no sense to make provision on a production motor for a gearbox change some years ahead of the actual changeover.
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Jonathan-W (05-04-2017)
#10
That is what I was thinking. Around my bell housing are no extra pads or areas you could use to fit a different tranny. They are basically as round and the same shape as the TH400 - and that on an 89 lip seal block...
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that pic does have the early bosses for the 400 trans! jag used GM's chevy pilot dowel location, been on chevy blocks since 1955, all 4 cylinder,inline 6 cyl, V6 ,and all V8 till some LS and newer LT blocks.
and its the same as my 1978 5.3 block, that i used to center the 700 trans to the center of the crankshaft!, i used a Chevy 700 truck trans with an adapter plate for chevy to the round Jag bolt pattern , had to drill counter sink socket head bolts into the jag block!
must work been that way for 22years , and still runs great!
and its the same as my 1978 5.3 block, that i used to center the 700 trans to the center of the crankshaft!, i used a Chevy 700 truck trans with an adapter plate for chevy to the round Jag bolt pattern , had to drill counter sink socket head bolts into the jag block!
must work been that way for 22years , and still runs great!
Last edited by ronbros; 05-04-2017 at 07:23 PM.
#13
I did take pics but unfortunately am missing that sd card.
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