Driveline vibration Tsb out

Both our F/A and P/A are considered to be negative slopes. Every slope is "down" from the engine/trans. I confirmed this with a Dana Driveshaft Product Engineering Manager.

Your formula would calculate:

(-4.2) - (-4.5) = +0.3 J/A

 

That would make sense. I just looked at the pictures in the TSB of the angle finder on the driveshaft and it is reading negative. WTF!! Back to the dealer again.

 

god i wish i could of explained it that easily.

 

Me too

 

So I just called a third dealership that is brand new that I didn't know existed. I talked with a service advisor about my issue and he went and got a tech that knows drivelines very well. He was familiar with this TSB and has performed a few already. When I explained my angles to him he said that it sounds like the other dealers were in fact wrong. So once again, I'm going to another dealer to have this guy take measurements and see if he can clear all this up. Fingers crossed.

 

I made this rough sketch. The joint angles are drawn exaggerated to easier visualize. Based on the TSB table #2 this is what I should do. I had the trans mount and 4 leaf TSBs done separately before but I think table #2 still applies to me.

-0.4° or less = tilt pinon down with 3° wedge
-0.3° to +0.8° = tilt pinon down with 2° wedge
+0.9° or more = out of luck

Does all this seem right?

 

^ all I know from the TSB is that there is no condition on any vehicle where no springs are recommended.

all boxes with N/A only mean look to the adjacent triple-section of the chart and find where your measurements fit, column a, b, or c.

 

all the boxes with N/A are areas that do not apply for that wheel base for given angle ranges.... if you look you have the ACLB and DCSB all with the same springs at the given angle ranges, then the DCLB with different angle ranges.

 

I don't know where you came to than conclusion. The sections don't correspond to each other at all. However there are things on those charts that don't make any sense at all. On the last chart, for 4x4 double cab, how can you have an N/A in the second column for J/A greater than 1.2 degrees and right next to it have J/A between .3 and 1.5 degrees be in spec?

 

because 1.2° limit doesn't apply to DCSB that's why it's N/A

the limits DCSB goes from:
1.6°
0.3° to 1.5°
0.2°

The DBLB would use the 1.2° limit with
1.2°
-0.1° to 1.1°
-0.2°

The chart is correct.

 

Last I checked, 1.2 falls in between .3 and 1.5

 

Yes i know but you are not understanding how to read the chart correctly.

The chart has DCSB, DCLB, AC, etc... configuations all lumped together with different limits for no wedge, 2° wedge, and 3° wedge for each configuration.

Look at it this way:
The no wedge limit for the DCSB 4x4 is 1.6° but for the DCLB 4x4 it is 1.2°. That's why it shows N/A for DCSB under 1.2°.

 

Here is a different version of the charts. It should have been written this way.
NOTE there is no measurement that doesn't recommend springs, you just need to pick your model Tacoma, and use the range of angles and cutoff to select the specific pack
-------------------------------------------------
here are the angle ranges to use to decide if you are going to pick
the spring part number in column 1, 2 or 3.
ALL MODELS HAVE A PART FOR ALL ANGLES, only the cutoff is different for LB's

same = use the same part number shown for 4x2 DC
-----------------------------------
standard prev TSB[<-----0.9] [0.8<-->-0.3] [-0.4---->]

4x2 DC..........48220-04290 LH 48220-04220 LH 48220-04230 LH
...................48210-04650 RH 48210-04580 RH 48210-04590 RH

4x4 DC ...........same............. same.............. same
4x2 AC ...........same............. same.............. same
4x4 AC ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge

standard prev TSB[<-----0.4] [0.3<-->-0.8] [-0.9---->]

4x2 DCLB ...........same............. same.............. same
4x4 DCLB ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge
---------------------------------------------------------------------------------------------------
firm prev TSB[<-----0.9] [0.8<-->-0.3] [-0.4---->]

4x2 DC ......48220-04300 LH 48220-04310 LH 48220-04320 LH
................48210-04660 RH 48210-04670 RH 48210-04680 RH

4x4 DC ...........same............. same.............. same
4x2 AC ...........same............. same.............. same
4x4 AC ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge

firm prev TSB[<-----0.4] [0.3<-->-0.8] [-0.9---->]

4x2 DCLB ...........same............. same.............. same
4x4 DCLB ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge
---------------------------------------------------------------------------------------------------
standard No TSB [<-----1.6] [1.5----0.3] [0.2----->]

4x2 DC......... 48220-04290 LH 48220-04220 LH 48220-04230 LH
...................48210-04650 RH 48210-04580 RH 48210-04590 RH

4x4 DC ...........same............. same.............. same
4x2 AC ...........same............. same.............. same
4x4 AC ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge

standard No TSB [<----1.2] [1.1<-->-0.1] [-0.2----->]

4x2 DCLB ...........same............. same.............. same
4x4 DCLB ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge
---------------------------------------------------------------------------------------------------
firm No TSB [<-----1.6] [1.5----0.3] [0.2----->]

4x2 DC........ 48220-04300 LH 48220-04310 LH 48220-04320 LH
..................48210-04660 RH 48210-04670 RH 48210-04680 RH

4x4 DC ...........same............. same.............. same
4x2 AC ...........same............. same.............. same
4x4 AC ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge

firm No TSB [<----1.2] [1.1<-->-0.1] [-0.2----->]

4x2 DCLB ...........same............. same.............. same
4x4 DCLB ...........same............. same.............. same
wedge .............no wedge..... 2deg wedge........ 3deg wedge

 

I understand, but they should've made separate charts for DCSB/AC and DCLB's instead of sharing the chart with conflicting numbers. The whole TSB is vague in regards to the angles and how to properly compute the J/A.

This morning will be my third attempt at finding a dealership that knows how to measure this correctly. Toyota can't even make it simple for their own employees to understand. They're under the assumption that the brains they hire understand the -(-#) formula and it's apparent that a lot don't.

 

^yes the TSB is written like arse. all the info is there, but you need to be familiar with the way Toyota tech writers operate, and this TSB is not easy to take a quick glance at

 

Where is the piece of the TSB that talks about how to take measurements?

 

^page 12 thru 15

 

Thanks....I hadn't seen the TSB but found it.

 

I don't want to hijack the thread, but I would love to be able to apply the logic here (and I'm sure others would also) to solve the issues that everyone else is having after lifting or like me, changing out my crappy, flattened original leaf springs for an HD pack and now experiencing the same problems....take off shudder and vibes. The TSB tells you if you measure and get "x"....install these springs with these shims. My replacements leafs are much like the new 4 leaf pack so I would love to know what your measurements are after the TSB is performed with your new 4 leaf pack for the second shaft and the pinion flange.

 

My appointment this morning took all but 5 minutes. The tech that I met with has been a Toyota tech for over 20 years. He hopped in with me, went to the back of the parking lot, accelerated hard one time, and he felt it. We didn't even pull the truck into the shop. He just slid under it with the correct angle tool, measured it while I watched, and said "I don't need a calculator to tell me that -5.4 - -5.8 is a joint angle of .4". We walked inside, he ordered the springs, and made a phone call to find out when they'd be here. All the parts were in CA so he confirmed they'd ship today and arrive tomorrow. My appointment for install is Monday morning. Why couldn't it have been this easy from the beginning?

Hats off to the dealers and techs that actually give a $hit.