Good afternoon BITOG Faithful!
I present to you a UOA from the transmission of my 1987 Toyota 4Runner's W-56 5 speed transmission. Oil was in use for approximately 5 years give or take and 50,551 miles. Notes to Blackstone concerning the anticipated high Calcium and Silicon are from the addition of a new short throw shifter base 2 years ago (used silicone RTV) and the color of the drained oil (redish hue) led me to suspect that there was some cross pollination from the transfer case which was filled with REDLINE heavyweight shockproof gear oil (red), knowing that the heavy shockproof contains a TON of calcium I warned them it might show up in the analysis. The trace of water is also likely from the transfer case as I previously had a water intrusion issue with the transfer case which has since been corrected but was not corrected before this fill on the transmission went in, so the cross pollination from the t-case likely brought a little water with it at some point.
No worries the wear metals look great here compared to universal averages and really good when you consider the transmission has 331,111 miles on it at the time of this sample. Transmission was refilled with MT-90 and I intend to run another 50,000 miles.
I present to you a UOA from the transmission of my 1987 Toyota 4Runner's W-56 5 speed transmission. Oil was in use for approximately 5 years give or take and 50,551 miles. Notes to Blackstone concerning the anticipated high Calcium and Silicon are from the addition of a new short throw shifter base 2 years ago (used silicone RTV) and the color of the drained oil (redish hue) led me to suspect that there was some cross pollination from the transfer case which was filled with REDLINE heavyweight shockproof gear oil (red), knowing that the heavy shockproof contains a TON of calcium I warned them it might show up in the analysis. The trace of water is also likely from the transfer case as I previously had a water intrusion issue with the transfer case which has since been corrected but was not corrected before this fill on the transmission went in, so the cross pollination from the t-case likely brought a little water with it at some point.
No worries the wear metals look great here compared to universal averages and really good when you consider the transmission has 331,111 miles on it at the time of this sample. Transmission was refilled with MT-90 and I intend to run another 50,000 miles.