Is this truck 2wd or 4wd? NP205 and 208 (you've mentioned both) are transfer case models, not transmission's. Obviously, a transfer case would only be applicable in a 4wd.

As for a diesel rear axle, I didn't think 5.13 was a factory, especially with the diesel. Those weren't capable of going much higher than ~3200 RPM due to the mechanical governor. Besides, they bring loads of torque in the 2000 RPM range, but not a lot of HP due to their low RPM limit.

 

Tim Allen's Home Improvement Grunt - YouTube


I go right-down to get my T18 into reverse.


TC?????? Torque converter?????????

 

Torque converter?!

Manuals don't use a torque converter. They use clutches with flywheels, pressure plates, throwout bearings, and clutch forks. All this in place of a torque converter. The torque converter automatically "slips" the "clutch" when you start off and change gears to take the place of a clutch on a manual transmission.

The Borg-Warner T18 & T19 Transmissions - Novak Conversions

There's information on the T18 and T19.

Are you SURE you have to shift to the right and up to go into reverse? If such is the case, then you don't have a New Process 435 or a T18 or T19. You have one of the other, non-granny transmissions that Ford put into the trucks.

The best thing for you to do at this point is get someone to give you some definite answer as to what's in the truck.

I'm getting confused as to transmission, transfer case, and rear end. This junk is cobbling my head up. o.O

 

Yes, I know that, thank you.

Was merely trying to show how using vague abbreviations can be confusing and irritating to some people.

 

I was responding to the OP's post. Sorry for the confusion.

It sounded like he was saying a manual transmission used a torque converter.

 

Actually, Chrysler did that in the 50's. Was called a Fluid Drive.

 

I was told the T18 shifted like that back that for the 1966-1978 version of the T18 and was running 1.00 for 4th gear, but an extreamly low 6.32 granny gear. Reverse was even lower than first at 7.44.

I found this on a manual transmission guide:

From 1966 until 1978, many T18s used a T98 shifter assembly. 1979-newer T18s used a three-fork shift cover assembly that shifts reverse gear directly. Because of this, reverse location is on the opposite side of neutral than the earlier version (‘66 to ‘78). Earlier versions reverse gears shifts over and up - later versions shift over and down.

Maybe the top end was even rebuilt on a later T18 transmission??????

I do apologize for for the abreviation and the confusion. as of late I am luck to get the internet to work long enough to write a post on here, and I suppose I just rush to get everything out all at one time.

The truck has some history as to where it used to be a drag truck. With that said I know the truck was rebuilt after it was retired, and I wouldn't be surprised to find the only things stock on it anymore being the cab, bed, and front end. We know the 460 aint stock, and the rear axle was swapped. I wouldn't be to astonished to find the tranny, and the transfer were also swapped out at some point in time.

I hope this post sheds a little more light things.

 

4wd? If so, that means the trans needs to be for a 4wd, and changing the rear axle ratio also means doing it up front, to make them match.

 

Yes it is 4x4. The front differential has not been changed over to the rear ends gear ratio, and so I have never engaged the transfer case into 4x4. My friend was supposed to get me everything I needed to know about the truck. What tranny, what transfer, what rear axle with gear ratio, along with the gear ratio in the front end seeing as I have not been home since R&R in dec. He was actually supposed to start rebuilding the entire truck for me, but has not touched a single thing in it.

 

I see. That does change things slightly. Would have been handy to have all this info from the start.

 

And VW did a variant of this in the late 60's into the 70's with the automatic stick shift transmission.

 

Yes it would have, and I am sorry about that. I suppose I just got ahead of myslef, but the help has been of real help to me. I was forced to actually find out what I know about the drive train from ALOT of research, and from you all as well, but I am just going to change the transmission out at this point to a ZF S5-42 4x4 which really changes everything at this point anyway. I will however keep you all posted on the rout I am taking with the truck.

I am staying with the 460 BB and replacing the transmission with the 5 spd to give me an overdrive. I am not 100% sure of the gear ratio I am going to change the differentials to, but they will be changed. I am still trying to figure out exactly what transfercase I am running which will be all the difference in what I change the differentials to.

I am liking both the 3.73's and the 4.10's on my truck with my 33" tires that I will keep. Its all going to come down to the transfercase. I'm not really sure what to anticipate as far as what the transfercase is going to be so I will just have to wait untill I get home, or my friend comes through for me.

Hopefully I can give you all a bit better details soon.

 

Did you get a t-case with the ZF5?

 

No I didn't. I was waiting to see if I can marry up my transfer I already have to it. With no issue because I honestly aint sure if it will just bolt right up. I'm going to have to wait to find that much out.

I am not to worried about the low range of the transfercase seeing as I do not think it will be that important in my use. Both versions of the NP205, and the NP208 will all give me the same 3.12 final drive ratio running 4.10's in the differentials.I suspect I will find one of these two in the truck. To be honest I don't know the real big difference between them aside from different low ranges. We might have touched on it in this thread, but my short term memory fails me quit a bit do to an old injury so I will have to re-read through.

 

When junkyarding, you will find most 4x4 f250/350's have 4.10's, while there will be some 3.55's. I am not saying they didn't make a 5.13, but it would be hard to find in a pickup, probably more likely found in a chassis/cab dually or larger truck.

The 3.73 you are talking about will probably have to come from the aftermarket, and you will have to re-gear the front to match.