Hello list, newbie with RB + auto trans question

Post by **HeavyDuty** » Tue Sep 23, 2003 5:09 pm

Newbie here, not new to Nissans or forums but *did* search before posting.

I have an RB26 & I'm currently looking for a suitable 97-98 S14 to swap it into.

I understand some 2.5 GTS models came with auto transmissions?

With many available clean low mileage SE/LE S14's around equipped with autos, has anyone tried this yet?

I know they're not known for being that strong in stock form. I have in house capabilities of rebuilding one with good clutches & hardened shafts, upgraded converter, etc. I was more concerned with the tcm working alongside the manual ecm, logistics of mounting, etc.

Thanks in advance for any advice, I'm looking forward to being a part of this community.

Post by **Nismo_Freak** » Tue Sep 23, 2003 5:09 pm

Umm... GTST Auto transmission = No No for RB26 engine.

Post by **HeavyDuty** » Tue Sep 23, 2003 5:09 pm

Thanks for the reply. That is more of a longevity answer than a compatibility (architecture) answer, correct?

Even if the RB26 was realtively stock boost levels & not thrashed?

Post by **rco8786** » Tue Sep 23, 2003 5:09 pm

What's wrong w/ a 5 speed? I don't know if you're going to find an auto transmission that can hold even a stock rb26 w/o some custom stuff.

Post by **HeavyDuty** » Tue Sep 23, 2003 5:09 pm

HeavyDuty wrote: I have in house capabilities of rebuilding one with good clutches & hardened shafts, upgraded converter, etc. I was more concerned with the tcm working alongside the manual ecm, logistics of mounting, etc.

I know it's an uphill battle to argue with those who prefer a stick. A manual is more fun, but imho, a *built* auto is more consistent & what I *think* I'd like in a daily driver.

I was just wondering if anyone had done it & was trying to get a crash course in compatability here.

Post by **davehoos** » Tue Sep 23, 2003 5:09 pm

there are lots of autos that would adapt to a rb engine.have to look more at the trans tunnel problems.have to find something with a small tourque convertor .

for a competition box shift quality isnt an issue.

slightly worked 500-600 Fwhp. maybe a bit more.

if it not a daily commutor then overdrive isnt an issue unles terminal speed is a bit slow.

not a fan of the late model auto but as the are resonably large

they are used on large 4x4 without much drama for towing.4.2 Y60 patrol/safari.

hollinger.[sp?]

Post by **HeavyDuty** » Tue Sep 23, 2003 5:09 pm

I think there's a universal harness made for the 4L60E GM trans, strong enough to propel the Lingenfelter 427TT to an 8.95ET. Basically a 4 speed TH400 with lockup converter. No strength issues there, but more work than a suitable Nissan trans.

Post by **Nismo_Freak** » Tue Sep 23, 2003 5:09 pm

Oh god... a TH400 would be hell on a RB26. The sheer torque to turn that transmission would make the RB lag horribly. You need something with a relatively quick first gear to get you going and with a good stall speed if you plan on ever racing it. I'm talking like 3500rpm stall if you want it to even move out of the hole.

Problem with that is... on a daily driven car your gonna burn it up (*cough* Aries! *cough*) and it's gonna get annoying when you chew through trannies. The transmission also is gonna need to handle a little over 8000 rpms worth of go from the 26.

I personally dislike auto's for anything other than daily driving and racing some 235830520365293649682 hp beast car that runs faster than a 8.

I think you can make it work, no doubt. Just getting the RB26 to mate up to an auto transmission that will suit your needs and stay alive is gonna be the debate.

Post by **Nismo_Freak** » Tue Sep 23, 2003 5:09 pm

davehoos wrote:there are lots of autos that would adapt to a rb engine.have to look more at the trans tunnel problems.have to find something with a small tourque convertor .

for a competition box shift quality isnt an issue.

slightly worked 500-600 Fwhp. maybe a bit more.

if it not a daily commutor then overdrive isnt an issue unles terminal speed is a bit slow.

not a fan of the late model auto but as the are resonably large

they are used on large 4x4 without much drama for towing.4.2 Y60 patrol/safari.

hollinger.[sp?]

TH350 and 700R4 fit.

Post by **HeavyDuty** » Tue Sep 23, 2003 5:09 pm

Yeah, you're right Nismo_Freak, a TH400 takes 30-40 more hp (and probably slightly more tq) to run than a TH350. A well built TH350 would be good to ~1000hp though. Way more than I want for this *driver* project.

A 9" 3500rpm converter (& subsequent heat buildup) would be no fun either.

It'd be nice to keep it in the family though. Does anyone know what the 2.5GTS trans model/code/family is? Same as the 300TT? Doubt it.

Post by **davehoos** » Tue Sep 23, 2003 5:09 pm

RE4R03A is the common type.same as patrol-VG30DETT.RE4R01A is used on VG30DE. and most other nissans.

australian GM-H vehicles use TH700.[4L60E?]. the new types dont have the old type one piece casing.the ealy types here are hydrolic control for easy conversion.also there are aftermarket engine managment units that control both eng/trans.

It s like the old 9 inch diff conversion crap that i told by all.the diff weigh heeps and loves to soak up power.same with autos.the nissan sold gearboxes,the only problems ive had are rear bearing failures,solinoid and convertor problems.but im not being silly.

Post by **HeavyDuty** » Tue Sep 23, 2003 5:09 pm

[QUOTE]Originally posted by davehoos "]RE4R03A is the common type.same as patrol-VG30DETT.

Thanks Dave, so the RE4R03A is a non-Z trans, but is used on the VG30DETT's, so it would bolt up to the RB & maybe a viable alternative to the RB25GTS auto transmission, if they are *not* the same unit?

Mack mentioned the Z32 trans as being short & would be an awkward fit in an S14, but I don't know if that is true for the manuals & autos, but I would assume it is.

So what is the 2.5GTS trans?

Thanks for the input guys, this is getting interesting.

Post by **davehoos** » Tue Sep 23, 2003 5:09 pm

RE4R01A is the only model listed including R33.

Z32 box,the manual gear box is short with a remote shift.like geartrag in bmw.other types like pickups are just the short rear housing versions.of the 81 mm box.gear stick is about 4-5 and a bit inches forward.short auto idont see any issue with that.

the patrol box is not much help as it has a transfer box attached.if you seen this type of thing it has a basic shaft hanging out with seal to stop oil from flowing to the transfer case.

nissan boxes have a seporate bell housing.ie remove a couple bolts and swap front housing never measured it for interchangability but the do look similar.its so basic the make a bell housing to fit just have to be good with alignment.

.not sold in australia but patrols are sold with RB30S and RD28ET auto.also the V6

send inquiries to someone like this.there are about a dozen such companies in aust.and the KIWI are also switched on.from what ive seen you can often ship all out of the states and get the work done and be still better off.http://www.rodshop.com.au/

Post by **HeavyDuty** » Tue Sep 23, 2003 5:09 pm

Thanks again, Dave, I'll try to contact those guys, it looks like they have a distinguished list of many combinations.

I'm not on a mission here, if it isn't feasible, I'll just do a 5spd & be done with it.

Hello list, newbie with RB + auto trans question

Hello list, newbie with RB + auto trans question

Re: Hello list, newbie with RB + auto trans question

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