May be old news but I couldnt find anything. I have head rumors of the jz bellhousing being a little shorter then 7m ones. Well today I had both jz and 7m driveshafts in the garage so I went ahead and measured them up and sure enough the jz one is 1/2" longer on the front half of the driveshaft. This may be something to consider for people to consider when doing your swap because if you run a 7m driveshaft you will not have full engagement on splines. I imagine this would affect the seal as well and your seal seats on the farthest part back of the spline I believe(?). And I imagine running a 7m one piece driveshaft would make the condition even worse but I think enough has been covered previously on running those 1pc ds's.
1j driveshaft difference
- Thread starter bkma71
- Start date
im running the same one off my 7m on mine
no leaks and no probs, taken it to 8400 rpms.
def good info to know for when i get a single piece driveshaft made
no leaks and no probs, taken it to 8400 rpms.
def good info to know for when i get a single piece driveshaft made
I doubt this.
Because then there would be known issues with bolting the transmission up and possibly different rear support members.
I have a JZA70 Trans and will be using it on a MA70 with the JZA70 Support member.
While the Part Number for the support member is different, i see no issues.
Maybe you have the wrong drive lines? Because the automatic is more than 1/2 inch of a difference but is longer, but the W58 drive line is about 1/2 an inch longer than the R154, but the input shaft is different.
Because then there would be known issues with bolting the transmission up and possibly different rear support members.
I have a JZA70 Trans and will be using it on a MA70 with the JZA70 Support member.
While the Part Number for the support member is different, i see no issues.
Maybe you have the wrong drive lines? Because the automatic is more than 1/2 inch of a difference but is longer, but the W58 drive line is about 1/2 an inch longer than the R154, but the input shaft is different.
interesting, can anyone shim in more on this? i thought it would be safe to use the 7m 1pc aluminum driveshaft on a 1jz setup, i was thinking about getting one over the summer
86_sports_1jz;1316244 said:
Go ahead and buy it, wile you are at it, do a massive 100 foot burnout for me. :naughty:
The 1jz/2jz blocks have a casting where the starter bolts to. that same casting is about one inch thick. reason why the bellhousing is alittle shorter on the 1jz/R154 transmission.
Myth busted.
Everything lines up factory with the 7MGTE parts from the tranny back mounts driveshaft, So the length of the bellhousing and block length of the maybe different the (JZ Parts) vs (7M Parts) but all the rest is the same.
Like maybe the JZ block sits closer to the firewall and further back in the engine bay then the 7M?
Like maybe the JZ block sits closer to the firewall and further back in the engine bay then the 7M?
I had three different ds's all from r154 cars. all spline slid into the r154 trans. And I have pics of the ds's at home. Im with soapra in agreeing that the 1jz bellhousing is shorter. The 1/2" in the ds is in the front half of the 2 pieces and the carrier bearing still mounts in the same location . Im not saying a 7m ds will not work but it will not be fully engauged on the splines inside the tail of the trans and from there it becomes a stress issue. Will post pics of the 2 different driveshafts when I get home.
Checked the part numbers, 1JZ shaft is a different part number than the 7M shaft.
Also, the rear transmission mounting plate is also a different part number between the 1JZ and 7M.
Jeff
Also, the rear transmission mounting plate is also a different part number between the 1JZ and 7M.
Jeff
Why not? I thought it was just confirmed the length difference was made up in the casting of the JZ series' block.
I have never heard of any problems using the 7M DS, with the different part numbers though I was wondering if anyone with an original JZA70 DS was able to measure the length and see if there is a difference or not.
I'm doing a JZ swap and will likely be using a 7M DS, but I'd like to know if there is any difference before I do.
I have never heard of any problems using the 7M DS, with the different part numbers though I was wondering if anyone with an original JZA70 DS was able to measure the length and see if there is a difference or not.
I'm doing a JZ swap and will likely be using a 7M DS, but I'd like to know if there is any difference before I do.
i dont think theres a difference... i just swap 1jz in my mk3, im using r154 tranny with the same DS
im using the w58 tranny and the w58 to 2j bellhousing....and it looked just a little shorter than the stock w58 bellhousing but my bolts right in and fits
Guyana00;1317397 said:
I measured a factory jza70 ds that came with my front clip this is where this whole thread started. It is a half inch longer. Yes you can use a 7m r154 ds on a 1jz r154 swap but it will not be fully engaged on the splines. I have pics I just keep forgetting to upload them.
I bet you would find that if you tried to use a jza70 driveshaft in a ma71 it would not work because it would push the carrier bearing back and you would not be able to line up the mount.
The 1/2" difference is changed in front of the carrier bearing. Maybe the the jz bellhousing is more then 1/2" and that could explain the casting piece in the front that soapra mentioned. I have not got my motor set out of the clip yet but I will be sure to measure this and fill in for you guys.
bkma71;1317686 said:
So it would be aight if i do use my 7m r154 DS on my 1jz r154? do i have to do anything make it fit correctly ?
I geuss if no one has had problems this far then it must not be to big of risk. you will have 2.5" of spline engagement rather then the full 3". Maybe if the 1jz were a torque monster it would cause more problems, personally I will just use the jz driveshaft because I have it. I realize this isnt possible for everyone that just buys a motor set and what not but your only options if you really wanted the full engagement would be to sorce a jz ds or get a 1/2" added to the front half of the ds. Reality is that it may not make a difference.
Also my measurement may not be completly correct so I wouldnt go taking you ds to the ds shop asking for a 1/2" as that is give or take. I can try to take more measurements but I did sell the 89ds so all I have to compare is the 87
I did notice another difference between the ds's in the 87 vs 89 carrier bearing mount as well you can see the diff in the pic.
I tried measuring from the flange to the center of the u-joint, and then from a flange thats in front of the carrier bearing and got the same results.
three different r154 ds's the rusty one is the jza70 one. I tried to label them but didnt work to well.
89 measurement from flange in front of carrier
<a href="http://s25.photobucket.com/albums/c66/bkma71/7m%20wholesale/?action=view¤t=5-12-09003.jpg" target="_blank"><img src="http://i25.photobucket.com/albums/c66/bkma71/7m%20wholesale/5-12-09003.jpg" border="0" alt="Photobucket"></a>
jza70 measurement from flange in front of carrier
here I tried to measure from the flange that goes to the back half of the ds
89
jza70
EDIT yes I accidentally wrote jza80 on the jza70 ds. What can I say I had mkivs on the brain lol.
Also my measurement may not be completly correct so I wouldnt go taking you ds to the ds shop asking for a 1/2" as that is give or take. I can try to take more measurements but I did sell the 89ds so all I have to compare is the 87
I did notice another difference between the ds's in the 87 vs 89 carrier bearing mount as well you can see the diff in the pic.
I tried measuring from the flange to the center of the u-joint, and then from a flange thats in front of the carrier bearing and got the same results.
three different r154 ds's the rusty one is the jza70 one. I tried to label them but didnt work to well.
89 measurement from flange in front of carrier
<a href="http://s25.photobucket.com/albums/c66/bkma71/7m%20wholesale/?action=view¤t=5-12-09003.jpg" target="_blank"><img src="http://i25.photobucket.com/albums/c66/bkma71/7m%20wholesale/5-12-09003.jpg" border="0" alt="Photobucket"></a>
jza70 measurement from flange in front of carrier
here I tried to measure from the flange that goes to the back half of the ds
89
jza70
EDIT yes I accidentally wrote jza80 on the jza70 ds. What can I say I had mkivs on the brain lol.
That driveshaft that you marked jza80 is still a MA71 Driveshaft. The jza70 driveshaft front half is not as wide as the MA71. I have used the MA71 Driveshaft in my 1jz's. I have done Over 100+ swaps and the 7M DS works well for all. I Used a 1jz DS on my 7MGTE, I later swap my 1jz in and no difference. I have Replaced 4 DS's in my personal car, and none ever because of the yoke. Mine always develoved play in the center carrier splines.
Jeff Lange;1316818 said:
In the later years Toyota changed the U-joints in all drive shafts to be none service type. rear mount bracket, there is three kinds They are labeled with a single letter. I have only seen three kinds. I think it's labeled A or B or C.
Soapra I respect how many swaps you have done and your builds, but how can you argue with this evidence? The ds came with my front clip, I am fairly sure it is a jza70 ds. If it is not then how do you explain the fact that it is a half inch longer and still slides into a r154. Also Jeff stated that there are different part numbers for a jza70 and ma71. I know a ma71 ds will work for a jz swap however I dont see how a jza70 ds would work in a 7m car with out modification.
soapra;1319242 said:
Actually they were not all changed, but non-serviceable type were introduced. They were called M-Joint and V-Joint. When I checked the part numbers I compared the same types. M-Joint type is the older style serviceable U-joint, V-Joint is the newer non-serviceable type.
37120-24140 - MA70 R154 M-Joint Front Shaft
37120-24190 - MA70 R154 V-Joint Front Shaft
57209-24041 - MA70 R154 Rear Transmission Mount Bracket
37120-14320 - JZA70 R154 M-Joint Front Shaft
37120-14340 - JZA70 R154 V-Joint Front Shaft
57209-14330 - JZA70 R154 Rear Transmission Mount Bracket
Like was said, clearly the MA70 R154 shaft works, and maybe the shaft bkma71 got with his setup was the wrong one even, but the part numbers are different. That doesn't tell me what the difference is, but they're different.
Jeff