GM TH 400 Auto box - Series 3 Etype
#1 GM TH 400 Auto box - Series 3 Etype
Thinking of converting my BW12 Auto equipped series 3 to 4 speed GM 400. Anyone with experience? Is it a worthwhile mod from a driving point of view?
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#2 Re: GM TH 400 Auto box - Series 3 Etype
Can't comment on the improvements, but John's Cars in Dallas, Texas uses the 700R4 transmission for his XJ conversion kits. His notes on the E page say he's considering a kit for the V12. Definitely a source for some of the required parts like the adapter plate.
http://www.brokenkitty.com/qb/v12qb.htm
http://www.brokenkitty.com/qb/v12qb.htm
Eric
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#3 Re: GM TH 400 Auto box - Series 3 Etype
Note that the GM400 is a 3 speed, not 4. The 4L60 and 4L80 are 4 speeds. The 4L80E is what Jaguar used for the 6.0 V12 cars, but it has a different bolt pattern than a 5.3 HE block, which I believe is also different from a 5.3 pre HE block.
The 4L80E is a big transmission, I doubt it would fit in an E Type. It's also a lot more than you need, it was used by GM in 3/4 and 1 ton trucks and motorhome chassis up to 20,000 lbs.
The 4L80E is a big transmission, I doubt it would fit in an E Type. It's also a lot more than you need, it was used by GM in 3/4 and 1 ton trucks and motorhome chassis up to 20,000 lbs.
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#4 Re: GM TH 400 Auto box - Series 3 Etype
The Daimler limo used the Turbo Hydramatic behind the 4.2 inline 6 with an adapter plate. Great transmission with the variants used with the V12 XJS and sedans until the last V12, XJR 306 supercharged 6.
Last edited by Geoff Green on Thu Feb 22, 2018 1:30 pm, edited 1 time in total.
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#5 Re: GM TH 400 Auto box - Series 3 Etype
The 4L80E is what I have in my X306 XJR6 with the AJ16 4 litre supercharged engine.Jagboi wrote: ↑Wed Feb 21, 2018 6:38 amNote that the GM400 is a 3 speed, not 4. The 4L60 and 4L80 are 4 speeds. The 4L80E is what Jaguar used for the 6.0 V12 cars, but it has a different bolt pattern than a 5.3 HE block, which I believe is also different from a 5.3 pre HE block.
The 4L80E is a big transmission, I doubt it would fit in an E Type. It's also a lot more than you need, it was used by GM in 3/4 and 1 ton trucks and motorhome chassis up to 20,000 lbs.
Peter
Peter
1966 LHD US Import Series 1 2+2 (undergoing full restoration)
1991 LHD Alfa Spider Series 4
2015 Porsche Panamera S
1966 LHD US Import Series 1 2+2 (undergoing full restoration)
1991 LHD Alfa Spider Series 4
2015 Porsche Panamera S
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#6 Re: GM TH 400 Auto box - Series 3 Etype
The wight of the 4L80 automatik gearbox from the 6,0 L motor is 120 kg ! ! !
Regards Wolfgang Gatza
Regards Wolfgang Gatza
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#7 Re: GM TH 400 Auto box - Series 3 Etype
I installed a GM 4L60e behind the 7.2L V8 in my Jensen Interceptor (which has since been upgraded to high compression pistons). I did have an upgrade kit fitted to it purchased from Monster Transmissions.
The "non-ecu" standard 4L60 would be a perfect choice for the S3 V12 and I have also wondered if it would fit. Just imagine doing 2000rpm at 120km/h (75mph)....
The "non-ecu" standard 4L60 would be a perfect choice for the S3 V12 and I have also wondered if it would fit. Just imagine doing 2000rpm at 120km/h (75mph)....
Best Regards
Philip
Jag: 72 S3 XKE, 74 S3 XKE OTS, 80 XJS (Megasquirt + 5sp manual O/D)
Jensen: 74 Interceptor (EFI by Megasquirt + O/D 4sp auto)
Chev: 59 Apache std, 70 C10 (350V8, 700R4)
Philip
Jag: 72 S3 XKE, 74 S3 XKE OTS, 80 XJS (Megasquirt + 5sp manual O/D)
Jensen: 74 Interceptor (EFI by Megasquirt + O/D 4sp auto)
Chev: 59 Apache std, 70 C10 (350V8, 700R4)
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