wake2wake623

OK i hope you guys will help a newb. I just registered but I have been lurking for a while and doin my homework. I am about to buy a 94 4runner that has already had a 3.4 put in. It was from an 03 tacoma engine ecu..... ect. The only problem with it is it has a blown automatic transmission. I was looking into swapping in a r151. Then I ran into problems as i researched about ADD. It got me to wondering if the previous owner even got the 3.4 to work with the 4wd as i had never really heard about how the ADD systems work or really read about it in any of the 3.4 swaps. Maybe i am in over my head or lookin to deep and creating a problem where there is none. My head is just spinning right now because i find info on swapping transmissions but then i wonder what changes because of the 3.4, and blah blah blah. Any info on any of these subjects would be greatly appreciated. So if I lost any of you.... Here is what I am trying to accomplish. 94 4runner 3.4 swap.....blown automatic Want to swap in r151 and tcase Want to maintain 4wd What do i need to do. Thanks again.

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wake2wake623

Bump anyone?

olharleyman

As far as I remember ADD is vacuum operated via vsv system , if you eliminate the vacuum and go to manual hubs you will get 4wheel drive put you may not get the 4x4 light on the dash.

Manual hubs or a manual ecu

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1990 4 runner 5 Speed
Pro Comp Stage II 4" Lift 6" coils rear
Aussie Locker front
5.29's Front And Rear
35 x 12.5 x 15 MT's Micky Thompson Classic II Wheels
Super Charged 3.4 on the way

1993 SAS 4runner 22re 5 speed
4" front 5"rear
5.29's
35 x 12.5 BFG KM'S
Dick cepek DC 1's

88 stock 4runner
3.0 auto
for now

1955 Harley Davidson Springer
Stock 1955 Hardtail Frame
4 Speed
Kick Start Only


1998 Harley Custom Dresser
107 rwhp
139 ft.lbs.trq.

vital22re

as long as you get the indicator switch on the transfer case wired in. You will have 4wd as long as it works now. Converted my add just by adding manual hubs. i still have the system so when it snows.. i lock my hubs and still maintain my shift on the fly.

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92 toyota truck 3.4 5spd 4.56 gears magna flow cat and muffler2 1/4 piping isr mod to intake 1.5 bjsfront add a leafs and 2inch lift shackles rear rancho shocks all around sitting on 265/75/r16 nitto terra grapplers

89934runr

I've done this swap. Some notes:

1. Get a good 3V bellhousing & modify the clutch ball depth. I'll post the measurement before I put mine back in (I just smoked my 1-2 shift fork).

2. The shifters are a few more inches forward than an R150, so much so that you'll need to modify the shift rods so they don't hit the dash. The shift boots work, but the pleather piece will want to interfere with your Tcase shifter.

3. I'm running one of Marlin Crawler's HD clutches & it's been spot-on for 2+ years now. Call them & they'll set you up with what you need (he can also modify a bellhousing for you). I mention this because I'm hard on clutches & this one is still real smooth.

4. The OD on the R151F/R150s is not as freeway-friendly as the auto (.84 for the R-series, .7 for the autos). So, if you have 4.56s / 4.30s and 31/33s, you're going to be singing down the road.

A question:

A. Was the truck an auto before? If so, you'll need to get a clutch pedal set, the clutch master cylinder, the hydro lines to the slave cylinder (hard lines to the rubber adapter line), the line mounting & support brackets, the slave cylinder, and a clutch fork and clutch fork boot. Oh yeah- a clutch release bearing as well (throwout bearing).

JEFF

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93 4 Runner / 3.4 swap / R151F swap / cash swap / 33s/ SDORI 1.5 BJ spacers / OME 900s