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  #1  
Old January 22nd, 2014, 03:26 PM
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Auto options for RoW 3.5 V8 90?

All:

What auto boxes will fit a 3.5 V8? I have a ROW Ninety SW. It has an 5-speed but I would prefer an auto. I know it will rob the rig of power but where it's going (U.S. Virgin Islands) a stick will suck. I plan to upgrade from the dual carbs to a single carb setup (likely Edelbrock 1404/2198 combo) which I am told gives an extra 20 hp.

-What gearboxes will fit?

-Will I need to change the tunnel?

-Can I lower the gearing of the rig whilst I do the swap?

-I know they cost millions of dollars, but is the NAS auto console the best option?

Yes, I did a search. I will likely do the swap when I replace the chassis/bulkhead.

Thanks in advance,

Paul.
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  #2  
Old January 22nd, 2014, 03:56 PM
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Yup lots of pics in the console thread I started a few years back.
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  #3  
Old January 22nd, 2014, 04:25 PM
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Quote:
Originally Posted by JSBriggs View Post
A ZF from a RRC or a disco. At that point you might even want to swap in the EFI engine as well.
Just pull the complete drive train from a late D1, ditch the Lucas ECM & install Megasquirt.... you'll get more power & decent fuel economy then
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  #4  
Old January 22nd, 2014, 08:31 PM
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If you get a R380 tunnel and convert your seat box you can use the Disco engine trans set up. If you use the 13 CUX you do not have as much wiring to deal with. The make a seat box flange conversion kit.
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  #5  
Old January 22nd, 2014, 08:37 PM
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auto fits with lt77 floors and seat box as well. Just did one. Tight as hell but fits.

OP didn't indicate what trans he has other than a 5spd. The lt85 is likely given vintage and that its a v8
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  #6  
Old January 22nd, 2014, 08:42 PM
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I recycled my disco engine and ZF box. Use a box from a 95 and prior Disco. 96 went obd2 and I think created electronic connections between the engine and box.
If you can't get one locally try ZF remanufactures in the US or Ashcroft in the UK.
You will also need the auto shifter, cabling and the extension piece taking the drive from the ZF to your lt230. The latter you can find on the Ashcroft site.
On the VI I might just go with the transfer box I have until I'm convinced enough to gear it to 1.2.
You will also discover that positioning the shifter will prove tricky. You may well have to move your console backwards or trim it.
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  #7  
Old January 22nd, 2014, 09:03 PM
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My suggestion would be to buy an entire Discovery. They can be had for under $800 pretty regularly and the transmissions don't fail often. That way you can have the transmission and other parts you need for the swap, and the rest can be sold or used on other projects.
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  #8  
Old January 23rd, 2014, 12:51 AM
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Any year Discovery auto trans requires input from an ECM to get torque converter lockup at freeway speeds. Otherwise your gas mileage will suffer.
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  #9  
Old January 23rd, 2014, 06:09 AM
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Not true. Its mechanical on all discovery (series 1)
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  #10  
Old January 23rd, 2014, 08:42 AM
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Quote:
Originally Posted by robertf View Post
Not true. Its mechanical on all discovery (series 1)
x2 its supposed to lock up around 53mph
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  #11  
Old January 23rd, 2014, 09:56 AM
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Does anyone how to get a 93/94/95 manual Defender ecu to work with an auto?
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  #12  
Old January 23rd, 2014, 01:00 PM
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Resistor that goes in the pnd switch. Chip is the same. Look at the 95 disco rave manual for the value

------ Follow up post added January 23rd, 2014 12:05 PM ------

Actually since you are going to auto you replace the resistor with the switch.
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  #13  
Old January 23rd, 2014, 08:53 PM
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Thanks guys! I am pretty sure I have an LT85 or 95 gearbox.

I have seriously considered buying a D1 & stripping it, but there aren't many locally.

However, the local junk yard has a '95 & '96.

I plan to head out there & buy a rear axle shortly.

I am hesitant to go from the 3.5 to the 3.9 because it sounds like if I go Edelbrock 1404/2198 combo, I'll get 20hp more & smoother running without the higher failure rate.

That said, if I go auto and add AC, it'll rob more than 20hp.

If the 4.6 were more reliable, I'd just go with that. But having suffered through two of those engines in the past ('00 RR 4.6 HSE and '04 D2) I am hesitant.

Maybe I'll just man up & stick with a manual transmission.

Anyone gone auto/3.5 & regretted it?

Thanks again.

Paul.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #14  
Old January 23rd, 2014, 09:09 PM
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Quote:
Originally Posted by Paul K View Post

...but where it's going (U.S. Virgin Islands) a stick will suck..

Paul, I think this is the big question.
Why is this truck leaving Oregon for the rusty, crusty south Atlantic sea air?
Don't worry about a slushbox; the whole truck will corrode in 12 months!
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  #15  
Old January 23rd, 2014, 09:23 PM
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Quote:
Originally Posted by Paul K View Post

Maybe I'll just man up & stick with a manual transmission.

Paul.
This, if you want an auto, get a disco or a rangie.
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  #16  
Old January 23rd, 2014, 10:29 PM
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Quote:
Originally Posted by Nomar View Post
Why is this truck leaving Oregon for the rusty, crusty south Atlantic sea air?
Don't worry about a slushbox; the whole truck will corrode in 12 months!
Plan to retire to the USVI in 10-15 years.

By then, she'll have a galvanized chassis & bulkhead, and lots of stainless steel bits.

I reckon she'll last longer than anything else!

------ Follow up post added January 23rd, 2014 07:30 PM ------

Quote:
Originally Posted by JohnsD90 View Post
This, if you want an auto, get a disco or a rangie.
Both have steel bodies though :-(
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #17  
Old January 23rd, 2014, 10:42 PM
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Quote:
Originally Posted by Paul K View Post
Thanks guys! I am pretty sure I have an LT85 or 95 gearbox.

I have seriously considered buying a D1 & stripping it, but there aren't many locally.

However, the local junk yard has a '95 & '96.

I plan to head out there & buy a rear axle shortly.

I am hesitant to go from the 3.5 to the 3.9 because it sounds like if I go Edelbrock 1404/2198 combo, I'll get 20hp more & smoother running without the higher failure rate.

That said, if I go auto and add AC, it'll rob more than 20hp.

If the 4.6 were more reliable, I'd just go with that. But having suffered through two of those engines in the past ('00 RR 4.6 HSE and '04 D2) I am hesitant.
If I were in your position (and when a cheap enough project 90 shows up on the for sale board I'll be there someday) I'd go with the 96 transmission. It uses the same flywheel and torque converter setup as the 97 D90 so if you ever need something replaced or rebuilt you can just pretend its a 97 and not have a Johnny Cash parts list.

I question the 20 hp you think you'll gain from that edelbrock combo. Read some of the articles here http://www.thewedgeshop.com/rover-v8.html The first one has a really good parts swapping documentation with real dyno numbers to back it up. Keep in mind both of your 4.6's used an entirely different EFI setup that ran at a much higher operating temp that had a lot to do with the unreliability that late P38s and all series 2 discos seem to be known for.

The parasitic loss is there for the auto, but its not that bad. I've got a disco with each setup (3.9 auto, 4.0 stick) and the r380 is quicker, no doubt, but the auto isn't that much slower. The GEMS ignition may have more to do with the power difference than the actual drivetrain.
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  #18  
Old January 24th, 2014, 12:35 AM
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Find a rusted out 94/95 disco or 95 RRC as a donor. They have the shifter like a 97 D90 and they will get you the axles you need and other spares.

You need everything off the back of the engine to swap in the auto, plus cooler lines and cooler and need to trim and fit mesh over the breakfast for the cooler. I am 99% sure you have an LT77. Possible you have an LT85, but I don't think so. You do not have an LT95 (they never came in 90s and have four speeds).

As far as bulkhead and frame, both of yours are in such good shape I would just take them off, fix any minor issues they may have, and have them galvanized rather than replace with new ($$$$).

The trans you have seemed to shift really well so I would leave it (Shan said it is a recent rebuild), but frankly I would leave most everything on that truck.
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  #19  
Old January 24th, 2014, 03:30 PM
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Quote:
Originally Posted by evilfij View Post
Find a rusted out 94/95 disco or 95 RRC as a donor. They have the shifter like a 97 D90 and they will get you the axles you need and other spares.

You need everything off the back of the engine to swap in the auto, plus cooler lines and cooler and need to trim and fit mesh over the breakfast for the cooler. I am 99% sure you have an LT77. Possible you have an LT85, but I don't think so. You do not have an LT95 (they never came in 90s and have four speeds).

As far as bulkhead and frame, both of yours are in such good shape I would just take them off, fix any minor issues they may have, and have them galvanized rather than replace with new ($$$$).

The trans you have seemed to shift really well so I would leave it (Shan said it is a recent rebuild), but frankly I would leave most everything on that truck.
Pretty much swayed towards leaving it a stick. Crunches a bit downshifting into second, but I can live with it.

Because the rig will spend the rest of its life in the USVI, I think it would be crazy to not put a new galvanized bulkhead & chassis in. Good opportunity to upgrade/replace all that original stuff when I'm in there (bushings, shocks, springs etc.)

Thansk guys!
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #20  
Old January 24th, 2014, 03:31 PM
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You are shifting way too quickly and you need to give a blip of throttle to downshift from 3rd to 2nd. All I am saying is to galvy what you have already rather than buy new. It will be as good and thousands cheaper.
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